How to Train Your Himbo

Story by Cinos on SoFurry

, , , , , , , , , , , , , , , , , ,

Bryce is a German Shepherd, a little worried about if he's virile and masculine enough to attract a partner. When the opportunity comes to participate in a study about boosting those very attributes, he joins eagerly, and the professor takes a liking to him, given that he's such a good boy! Commissioned by Irving


Bryce paced back and forth in his apartment. Should he do it, or not?

It wasn't that he wasn't virile and manly enough as it was. He stopped to look at himself in the mirror. The muscles were there, even if he wasn't quite a bodybuilder. His black and brown fur was nice and lustrous. Casting his eyes a little further down, his sheath left a bulge in his trousers, so he was certainly adequate there, too.

But if he was, why wasn't anyone interested in him, romantically? Oh, on some level he knew they were just empty worries, but like many men in their twenties, Bryce couldn't quite shake the feeling that maybe, just maybe, he wasn't masculine enough. Not quite the studly beast that women desired.

The other day, when he arrived home from college, he'd received an invitation, which had sparked all those worries again. The biology department was, it appeared, having some studies on how to improve male virility. He'd even get paid, the email said. It had a few paraphrased quotes from other men who'd taken the study, and they all described it as interesting and even pleasurable!

So, all in all, what did he really have to lose? Well, beyond a little pride, admitting to himself that he wasn't sufficient, perhaps, if he- no, he was entirely sufficient. That was just the constant, nagging voice of doubt. He could, though, be more so.

He sat down on the couch, flicking through the email again on his phone. It did say something about side effects, but that they were reversible until the very end, and that none of the participants had found them unwanted, so far. The language was so academic it made his brain hurt, and he wasn't exactly dumb.

"Some of the methods used in the study may result in increased excitability, altered academic performance, and a sense of re-prioritized values regarding both," which he took to mean that he'd probably_be hornier. Then again - he looked down at the crotch of his pants - maybe that only applied to those who already had a diminished sex drive for one reason or another. Bryce couldn't really imagine himself being _more horny. Like most German shepherds, he was a little overeager as it was, which he freely admitted might have played a role in him even considering participating in the study.

"The study will involve nudity and is very likely to result in instances of intense and unrestrained excitement, and as such, all participants should be comfortable enough with being observed during such..."

Maybe it was wishful thinking, but to Bryce, that sounded like a very euphemistic way of saying that he'd be cumming a lot, which also wouldn't be unwelcome. After all, masturbation did eventually get boring, at least for a young man seeking to broaden his horizons. He shook his head, chuckling. Reading the dense language was making him think in the same kind of overwrought academic style.

He tapped one of the links in the email, and filled out the form. Nothing ventured, nothing gained, wasn't that what they said? If it turned out horrible, he could always just withdraw from the study.

Bryce arrived at the rented clinic the next day with his tail wagging up a storm. He couldn't deny being excited, even if it was a kind of nervous energy. After all, he could be doing some good here, beyond just hopefully boosting his own virility - others less fortunate could certainly benefit from any advances they made together.

He stepped inside. The place was all white, fairly nondescript but for plants so waxy he couldn't quite tell if they were real or not. Normally, the place would be bustling with activity, but currently, as it was being used for a study, not so much. He sat down to wait, somewhat unsure of if he should call out or look for whoever he was supposed to meet. A cat named Shannon, they'd told him, who was the only cat working on the studies. Probably a professor, Bryce figured.

So he sat there, looking at his own reflection in the mirror-polished marble. At least he thought it was marble, but touching it would've been a faux pas. After some five minutes, he checked his watch, and realized there were five more minutes until the appointment. It was something of a curse for him, and every other German shepherd he'd ever known, the combination of punctuality and yet not having the patience to wait. He realized he was whining, and pinched his hand.

There was, at least, a coffee machine. It had a handwritten note of flowery letters on it, telling visitors to go ahead, so he did. Not that he really needed more energy, but it was something to do. Lazily, the machine churned to life, grinding "fresh" beans until eventually dripping a small amount of espresso into a plastic cup. Bryce picked it up and sniffed at it. It smelled, as expected, like coffee, though a little sweeter than usual. Maybe they really were using fresh beans, despite the rentable nature of the locale.

Finally, after what felt like an eternity sipping on the coffee, he heard a door creak open, and the tapping footsteps of someone in high heels approaching.

"Bryce?" a voice called out, and drew the dog's attention from the cup. "Come on in, it's time for your appointment!"

Shannon was a cat, indeed. An orange-furred one. In less polite company, and if slightly buzzed, Bryce might've referred to her as a sex kitten. She was wearing a lab uniform, plain white, but it did little to conceal her generous curves. Of course, being a polite dog, Bryce fought back the urge to focus even briefly on the bounce of her chest as she walked, and managed to almost entirely resist desire to look at her swaying hips as she led him to a what could only be a treatment room.

"So," she smiled, crossing her legs as she sat down. "You've read up on what exactly this process entails, haven't you?"

Her tone was soft, welcoming, and Bryce delayed a moment before answering her.

"Sure, yeah. If it's just the stuff in the email?" he asked. His tail was wagging again. He was always fairly eager to please, and Shannon's sensual appearance and mannerisms weren't helping him any. Mentally, he steeled himself to act more professional. "That is, that the results are reversible up to a certain point, and that I can leave the study at any point?"

"That's right!" Shannon beamed. "Nobody has left the study abruptly yet, though, so you don't have much to worry about. Tell me, are you squeamish about needles at all?"

He was, but equally, he wasn't about to admit it. Though maybe it'd be better if he did, for the sake of the study.

"A little bit, yes. I can just look away, though. Is the injection all we'll do?" he asked, secretly having hoped to get to spend a little more time with the feline.

"Not exactly," Shannon replied. "For this first appointment, there will be an injection, and then a VR session. You know, like video games, basically," she grinned, gesturing towards a heavy-looking headset on a table. "I think you'll enjoy it. It's in order to put you into a more, ah, virile mindset," she added.

After a little pause, as she looked Bryce over, she spoke again. "I hope you're not against viewing erotic material, because a lot of it is exactly that."

"No, no, I'm fine with it. It's for a scientific purpose, right?" Bryce grinned.

"I figured, young men like yourself rarely mind it too much," Shannon smiled. "Okay, have a seat over here," she added, nodding towards a chair. It looked like usual chair one might use to get a vaccine or have samples taken, except it had straps for the arms. Bryce couldn't imagine them ever being used.

He moved over to the other chair and sat down.

"If you don't mind, could you take off your shirt? The injection is typically a quick jab in the shoulder," Shannon asked, and Bryce complied. She came over with a small thing that almost looked like an autoinjector.

"Here we go," she smiled, pressing the device against Bryce's modestly defined biceps. There was a little sting, but Bryce was plenty distracted by seeing her lean over, just enough cleavage that he once again fight not to stare. She had a faint scent of lavender about her.

"And there we go, as it goes," she added. "Now, if you'll just lean back and relax, I'll get this headset on you. Just go with it, don't fight any natural reactions that might happen."

Bryce could feel a sense of warmth spreading from the injection side, up his arm and gradually through more and more of his body. It wasn't unpleasant, and in fact, kind of soothing. He groaned softly, leaning back into the chair, feeling rather stress-free and relaxed in just a few seconds. He realized that his cock was swelling, too, but she'd said not to fight any reactions, so he didn't mind too much, letting his shaft slip free of its sheath and leave a rather pronounced bulge in his jeans.

Ah, he felt relaxed enough to have a nap. Or to stare at Shannon's breasts, barely trying to conceal it anymore. They looked so beautiful, jiggling with each of her motions as she picked up the headset. He wondered, mind half-empty and relaxed, how they'd feel against his palms. She offered him a knowing grin in turn, almost a flirty one, if not for her professionalism - and then he couldn't see anything as the headset was placed over his eyes.

"Yep, just stay like that. Enjoy the show," she grinned, and then her voice was muffled too as she put a pair of headphones over Bryce's big ears as well.

The headset lit up. At first, it simply showed him a scene of a green, verdant field. A little like that classic background computers always had, but more immersive. Bryce heard a pulsating, rhythmic sound through the headphones. He was a little too relaxed, maybe, and slowly, slowly-

Shannon smiled as the dog went under. He wouldn't remember much of the treatment. She always enjoyed this part, maybe a little too much given that she was supposed to stay neutral. She'd even partaken in something similar herself, once upon a time - it hadn't affected her mind much, but her proud breasts were a result of it. All in all, a very good experience, but the male variant of the treatment was new.

She tapped a few keys on her laptop, and the images on the headset changed, if slowly, from relaxing nature scenes to outright porn. He'd be even more receptive to them than usual, thanks to the medicine she'd administered. Oh, she'd had tons of fun manually curating the right selection of clips and images the treatment used. Point of view shots of countless passionate matings, always from the male's point of view, each followed by an almost longing shot of the female's dripping, inseminated sex, and then, a flash forward to the same woman, now proudly pregnant. Repeated, of course, until the drugs began to wear off.

The cocktail had a few other effects, too, but Bryce would find those out in time. After all, it was a blind study; the participant couldn't be expecting anything specific, or the reported results would be biased. She watched his cock throb, visibly so, even through his jeans, as clip after clip of loving, successful breeding burned its way into his subconscious. It was always such a sexy sight, and she in turn had to fight the urge to speed through this first step. Loving your job wasn't always purely a positive thing, as she'd realized a long time ago.

Bryce, on his part, was in a half-wake, utterly comfortable state of warm, erotic fantasies. It was increasingly difficult to tell which of them were from the headset, and which were his own, but he saw - or imagined - himself hunched over woman after woman, thrusting eagerly between their legs or under their tail, each orgasm doubly rewarding as he knew his seed would take root as he spilled it into their fertile depths. One after another, all ending up happily pregnant with his litters.

He never actually came. The drugs suppressed that. The aim was, after all, to increase virility, and that meant not wasting his seed. It _felt_as if he did, though, each spurt of cum he gave his dream-wives and lovers sending a jolt of pleasure through his body and making him feel like a very, very good boy indeed.

And then, Bryce woke up. He felt warm and tingly, but not _different._If anything, the sensation was best described as feeling more like himself than ever. It took a while for his senses to return, and during that time he dumbly stared ahead, his mind feeling pleasantly empty, as if there was nothing he had to worry about. It wasn't until Shannon tapped him on the shoulder before he snapped back to reality.

"Oh, uh, how'd it go?" Bryce asked, and blushed fiercely as he quickly draped the sweater he'd been holding over his crotch.

"It went perfectly well, you did great," Shannon replied, with a wide smile. "And don't worry about that," she added, nodding towards the bulging erection that Bryce was trying to hide. "It happens to very virile males. That, and next time you'll have it out, if you're comfortable doing so!"

Bryce tried to formulate a reply, but found himself struggling, mind still sluggish after the treatment. Not unpleasantly so, it actually felt good to not think so much. So instead, he simply nodded in turn. If Shannon was okay with it, why wouldn't he be?

It wasn't until he was outside that his mind began to actually clear. He felt incredibly horny, still, despite the cold air. Then again, that was the goal of the treatment, wasn't it? If there was a way for them to use this treatment on someone who'd lost their sex drive, it'd be a revolution.

The very first thing Bryce did when he arrived back home was to masturbate, several times, most of them to fantasies of Shannon in her tight uniform, until he was a panting, heaving mess, and then he collapsed into bed. It'd been a long day. His studies didn't feel terribly important, and in some way, he wanted to skip ahead to the next day for the next treatment. He'd call in sick if he had to, the experiment was way too interesting to let anything else get in the way. That, and Shannon was so excited about it that he just wanted to please her.

Before he had any time to be concerned about that unfamiliar feeling of submissiveness, even by the standards of his species, he was fast asleep in a very similar haze of erotic dreams as earlier during the day.

He was a little worried when those thoughts still lingered in his mind by the time he woke up - with morning wood, as usual - but at least they were fading. Shannon had assured him that the results were reversible, after all, and she'd tell him before they reached the point of no return. Anything else would probably get her kicked out of the university, Bryce reasoned. He slurped on his coffee, even managing to get some studies done before the next appointment. He was still clearly disinterested in them, but with some discipline, he got it done just in time. Instead, Bryce found himself wondering if he'd ever like to have pups. It was a strange thought, one that didn't entirely feel like his own, as he'd never wanted to settle down, or take on the responsibility of getting someone pregnant. Yet, each time he imagined himself spilling his seed deep inside a fertile woman, he couldn't avoid quivering with subtle excitement. It almost felt like he'd done it before, countless times.

This time, when Bryce opened the clinic door, Shannon was already there waiting for him. A little too early. She had a rather warm, welcoming expression on her face.

"Welcome back," she smiled, in a way that that made Bryce shiver. Somewhere between predatory and maternal. Maybe that was just how she always looked. "Ready for the next treatment? This next one should be pretty satisfying!"

"Uh, sure, totally" Bryce replied. "...I think?" Had he always sounded so vapid?

"Great! Don't worry, I think you'll definitely enjoy it. Plus, think of all the couples our research will be helping, if you get uncomfortable!" she purred, leading him back to that room. This time, Bryce couldn't help but stare at her rump as she walked. Her hips were just wide enough to nearly hypnotize him right then and there, swaying back and forth. Was it just his imagination, or was she wearing a shorter skirt, too? Maybe tighter too, with how it hugged her cheeks.

"So, here we are," Shannon exclaimed, and Bryce sat down in the treatment chair without needing to be prompted. He was hard again, but Shannon was clearly comfortable enough with it, so he didn't bother trying to hide it. Whether it was from her presence or from the Pavlovian reaction to the very pleasant - if unremembered - experience he'd had last time, he couldn't quite remember.

Shannon had to swallow the urge to call Bryce a "good boy". Not that he wasn't, he most definitely was. But calling him that would just be creepy and patronizing. Matronizing? Ugh, she'd promised herself to not end up like all the creepy old professors she'd come across during her long studies. She tried to picture herself in his position, and how incensed she'd feel if called a good girl for following basic instructions. On the other hand, the shepherd was definitely cute, sexy, and a perfect test subject too. And fifteen years younger than herself, too. Get a grip, girl.

She gave Bryce the injection, and he groaned happily, relaxing in the chair as all his worries and anxieties melted away, curiously following Shannon's movements as she picked out what looked like a pump from a drawer.

"So for this next step, I'll be putting this over your penis," she grinned. "It'll provide some stimulation. I'm doing this because the orgasms help the treatment - it's to release hormones to interact with the medicine - so I recommend just letting it happen and not fighting it."

Her grin was definitely predatory, there. All Bryce could muster, though, was a dopey grin, his tongue lolling from the side of his mouth. Being this relaxed and empty-headed felt great. Before he came here, he'd a long mental to-do list for the day, and now, it was pleasantly empty. Bryce stared fairly openly at her cleavage, his cock once again slipping free and swelling with desire. Her tits just looked like the best thing ever.

He shivered as Shannon unbuttoned his jeans and tugged down his underwear, letting that proud erection spring free. She bit her lip, seeing it bob so eagerly in front of her. Maybe that treatment long ago had affected her mind a little bit, but not as much as it'd be affecting the dog. Bryce watched her slide the pump - a transparent one, with a hose connecting to the very end to some storage tank - over his cock. It was tight enough to make him want to thrust into it, but right now, he was entirely too relax.

"Mmh, you like that, don't you?" Shannon grinned. She pressed a button next to her keyboard, and the pump began to slowly milk Bryce's ready shaft. He groaned in response, shaft swelling and a wet spurt of precum erupting into the tube, only to be immediately sucked away.

"And now for your favorite," she added, giving his balls an affectionate squeeze to help them do their duty, before strapping the headset over Bryce's eyes again. Not the headphones, this time. She wasn't supposed to do it, but the young man looked adorable weakly quivering as the display lit up, and so she decided she'd make an exception just this once and manually guide him through the treatment.

Bryce's mind swam in the same erotic imagery as before, only this time, he could feel it. With his senses enhanced by the drugs and the pump working diligently around his shaft, he could feel each thrust into every nameless woman. The sweet, gentle suction of their cunts as he pulled out, and that utterly erotic clenching quiver as he thrust back in. The clips were longer, this time, for the same reason. The first treatment had implanted the idea of being a breeder, and it'd taken root in the young dog's mind. This second one would make sure he pleasured his partners while doing so.

"There you go, push deep into her," Shannon's voice echoed. She sounded ethereal through the haze of lust, like a goddess of fertility and breeding. The video on the display slowed down to emphasize the action as it showed himself mounting an eagerly whinnying mare.

"Every time someone asks you to, you'll mount them, giving them a healthy load of your seed," she purred. "Good boys do what they're told."

Bryce's hips twitched as he sank into the imagined mare, and the pump tightened around his shaft. He was a good boy, and good boys were eager to breed everyone who asked them to.

"Of course, you'll hold back until you feel her orgasm," Shannon continued. Her fingers danced gently over the short fur covering Bryce's balls. She loved the way they were already tightening against him. "Luckily, all your partners today are very quick to do so. Just keep rutting into her, and when you feel her begin to milk you, don't hold back. Spill your seed like a good boy."

Half the process was automated. Relaxed as he was, Bryce's muscles still twitched with each recorded motion the video showed him, and the pump matched each with varied tightness and suction. Soon enough, she came, and it mimicked the clenching almost perfectly.

Bryce moaned out loud, grunting and twitching as sperm erupted from his cock with each clench of his taint. His vocalizations were barely coherent now, with how overwhelming the pleasure was. Shannon watched, almost equally entranced, staring at each beautiful buck of his cock and the precious white cum spurting into the milker. God, just imagine how it'd feel inside you. Yet, she forced herself to continue, even though her own instincts told her to pull the milker off and mount Bryce herself. Mh.

"There you go, you're such a good boy," she continued, murmuring as she leaned closer to Bryce's ears. "And look, you knocked her up-" the video flashed over to the future, showing the same mare proudly pregnant, carrying a litter of Bryce's pups. She looked happy, and that made Bryce feel happy too. "-just like a good breeder boy does. Oh, here's your next partner..."

The hormones released by his massive orgasm intermingled with the drugs in his system, kickstarting a chain reaction of physical changes, each designed to make him a more desirable mate. Those ones weren't reversible, Shannon noted. But no man had ever wanted to roll them back, either. She watched with barely concealed lust as Bryce's cock swelled a little further, growing thicker and longer. His balls, too, plumped up, a little more capacious and productive. The changes were small, but with enough orgasms, he'd have a cock that'd both impress and pleasure any horny woman he came across. One that'd be obvious between his legs even when he wasn't hard.

Suddenly, Bryce was between a vixen's legs, her chest bouncing with each thrust. He didn't question it. The memories between each breeding weren't important, were they?

"Now, the next time you cum, I want you to stop thinking entirely. Good breeders don't think, they let their partners take care of that for them. Let those thoughts spurt out with every throb of your cock, you don't need them anymore. A dumb boy is a happy boy," she narrated. This was going _entirely_too far, but it was getting her so damn horny. She was acutely aware of her panties, sopping wet, clinging to her tingling mound.

Bryce didn't really need the encouragement. He bred the vixen, then a wolf, a lion, a donkey, a rabbit... an endless parade of partners, and with each one his cock grew a little more, his balls grew just a little rounder and fuller, and fat melted away from his body to give room for rippling muscles. And with each orgasm, thinking became a little harder. Not that he was doing much thinking at the moment. In the end, he was still cumming, but nothing came out, and it was only then that Shannon realized she'd kept the session going for at least twice as long as she should have, letting herself get carried away.

Hastily, she turned off the headset and pulled it off. For a good few minutes, Bryce couldn't focus on anything. Her voice still echoed in his ears, even though she'd stopped talking minutes ago. His jaw was slack, his eyes almost glazed over.

"How do you feel?" Shannon asked, hesitantly.

Slowly, very slowly, Bryce was beginning to recover, to some degree at least. His now nine-inch cock was still hard and throbbing. His balls were the size of small plums, already working overtime on producing more cum.

"It's... really, really hard to, ugh, think..." he groaned. There was definitely something wrong, he knew that much, even if his tongue felt too clumsy to articulate exactly what it was.

"Oh, that just means the treatment's been a success so far," Shannon replied. Granted it might've been a little more successful than planned. "Studs don't really need to think, right? Overthinking definitely reduces your virility."

"Viri-whuh, oh like..." Bryce stammered. He could barely remember why he'd even come here, but after a few moments he at least remembered what virility meant. Didn't he have important things to do, though? Things that he'd need to be able to think for? "...fuck, I have classes I need to study for," he suddenly groaned, the grim realization waking up some part of his dazed mind again. "Can we like, return, uh, rev... go back?"

Shannon had a choice to make. She could hang onto the frayed ends of professionalism and end the study there. They'd gotten results, and given some time, Bryce's mind would recover. He'd be left enjoy the benefits of a much higher libido, a perfectly toned body, and frankly put, a pretty impressive cock. On the other hand, she found herself staring at said cock, once again wondering how good it'd feel inside her, and rather than doing the responsible thing, she realized she found the dumbed-down and very horny shepherd fiercely attractive. All her friends would probably like him, too. Just imagine having him as entertainment for the next ladies' night. On the other hand, if she was ever found out, it'd be the end of her career. And probably her life outside of prison.

It wasn't as if Bryce was going to complain, though. She bit her lip, rolling up her skirt when Bryce wasn't looking at her.

"I guess I... guess I should be, like... going home, right?" Bryce groaned, standing up on shaky legs. "So I c-can recover a bit?"

He looked like a lost puppy, unsure of what he was supposed to do, which tugged on all of Shannon's maternal instincts, in the worst possible way. This wasn't the right thing to do at all, but her pussy was increasingly doing the thinking for her. "Wait a moment, have a look," she huffed, letting one of her misguided hands slip down her thighs, dipping between them, hooking a finger around the front of her wet, lacy panties. And then, she pulled them aside.

Almost immediately, all that slowly recovering intelligence drained out of Bryce's mind and into his cock. He'd always found it a little hard to resist obvious invitations, and now it was outright impossible.

"Wouldn't you rather just fuck me instead?" she purred, unbuttoning her shirt and letting her bare breasts spill out as she leaned back in the chair, spreading her legs a little wider. "Like a good boy?"

Oh god, seeing the vapid, horny expression on Bryce's face was driving her wild. She was drooling to get a taste of him, and his eagerness to stuff that massive cock into her was adorable. Shannon hopped up and shoved the dumbfounded dog back into the treatment chair. She draped her arms over his shoulders as she straddled him, letting Bryce get a close look at her tits. He seemed to like it, unhesitatingly lapping over her stiff, thrumming nipples and the bumpy, sensitive surface of her areolas. And then wrapping his lips around one and then the other, broad tongue slathering her with adoration.

His fingers dug into her plump cheeks as he guided her over that stiff breeding rod, still slick with seed he'd spilled earlier. Briefly, Shannon realized today was probably a fertile day, but screw it, right? Bryce had been drained enough that there shouldn't be any risk. She let herself relax, letting him guide his motions. It'd been entirely too long since she last got a good, hard fuck. So when his hands pushed her hips downwards, she let it happen, moaning out loud as that thick, incredibly hot shaft sunk into her, both of them so wet that each inch was effortless and slick despite his newfound girth.

And his mouth never left her nipples, jumping from one to the other as he began to thrust, bouncing Shannon gently, at first, in his lap, making sure she was relaxed enough before he sped up. Her pleasure was all that mattered. Not that he wasn't enjoying it; pumping into her clutching, heated depths felt beyond amazing, and he couldn't wait to let go and pump his seed into her, just as nature intended. He was nothing but a good, dumb boy with a big cock that ached to be put to its proper use, after all.

Each time he hilted himself in her, Shannon cried out at the top her lungs. She saw stars as that beautiful cock bumped against her hidden inner pleasure-spots. Before the treatment, Bryce had been a clumsy lover at best, but suddenly, he had the experience of someone far older, his motions deliberate and perfect, honed over the countless sessions burned into his memories. She could barely support herself, but his strong hands kept her upright and deeply impaled on his cock. All the way to the swollen knot at the base. She could've sworn she felt it nudge against her cervix too, precum-dribbling tip kissing her deepest depths over and over again.

"F-fuck, you're such a good boy," she moaned, her shaky voice dripping with lust and need. "Harder, fuck me harder!"

He did, bouncing her shaking, trembling body like a ragdoll in his lap until Shannon suddenly stiffened, mewling with joy as she came, hard, Bryce's cock playing her body like a fiddle. She clutched tightly against her new, perfect lover as her body squeezed around him, silken inner walls clenching and milking around his cock. Through that orgasmic ecstasy, she felt him stiffen too, a throaty growl resonating in his chest as he hilted himself all the way inside her, deep enough that she felt those oversized balls tickle her slit - and then, he let go. His cock throbbed and a wet, molten heat quickly spread inside her depths. Had she miscalculated how quickly he'd recover thanks to the treatment? Ah, fuck it. It felt too good to worry.

For Bryce, it was overwhelming. His mind was totally blank as he grinded against her, trying in vain to bury himself even deeper as his balls tightened. Shannon wanted his pups, and he was in no position to deny her. Good boys didn't do that. And so, he let his orgasm take over, grunting and huffing as he stayed with his tip nudged against her cervix, all tension - and with it, what little remained of his scholarly aspirations - erupted into her in rich, silvery ropes of incredibly potent cum. He stayed there, not moving an inch but for the throbbing of his cock until the jolts of pleasure faded away, feeling such immense satisfaction that really, nothing else mattered at the moment.

She'd definitely have to take this one home.


A couple of months later, it was time for the traditional, biannual Bad Movie Night, that Shannon liked hosting for her friends. And this time, there was extra entertainment!

Back in the good old days, she'd had quite a few more guests. A lot of them had since moved away, or found themselves otherwise busy with adulthood, many of them with children to take care of. Shannon looked at the bump in her own belly. She'd be joining them soon, thanks to Bryce. That's how it went, wasn't it? One moment of carelessness, and bang. Babies. She had some seven months to go, though, and was determined to make the best of it. That, and while she'd been terrified at first, she realized later that she kind of liked being pregnant. There was a kind of constant warm fuzziness, each time she thought about the pup - or pups, plural - growing inside her.

It left her quite a bit hornier than usual, too, which was a bonus given that she'd since "adopted" Bryce and kept him on call to come take the edge off. All in all, totally worth it, she figured, and she couldn't wait to introduce him to her friends. She had a packet of condoms just in case. If this was the last time she got to do this, at least it'd be a grand finale!

As her friends arrived, one by one, Bryce was lazing on her couch. He wasn't much good for earning money these days, but Shannon was well off enough to support him. He didn't mind; he got to fuck her a lot, and relax the rest of the day, except for some chores. Despite his, as Shannon liked to call it, reduced mental acuity, they'd developed a fairly loving relationship. Granted, she had to keep him on a tight leash to keep him from trying to fuck everyone who flirted with him, but that was really her fault.

Mia arrived first. The mouse was always pretty punctual, and probably just as enthusiastic as Shannon was about hanging out and watching awful movies together. Soon after her came Harper and Chloe. The tiger and rabbit had been delayed mostly due to bumping into each other just outside and getting distracted.

"So you're finally settling down? God, that's adorable," Mia giggled once they'd all made it to the living room and sat down. She uncorked a bottle of wine she'd brought - alcohol-free, since she'd already gotten the news about Shannon having gotten knocked up - and leaned back, looking at Bryce. "How'd you two even meet?"

"Oh it was like, one of her studies," Bryce replied. "At the... the university."

He was getting excited just looking at Shannon's friends, and they were still fully dressed. Still, he'd recovered just enough of his mental capacity to at least know not to stare, as distracting as their bodies were.

"Yup! Can't tell you the specifics yet, though!" Shannon added. "It's a work in progress."

"Mhm," Harped rumbled. "Are you sure it's good for your career to hook up with a test subject? And you know, letting him knock you up," she quipped, poking that little baby bump Shannon was already showing. "Just like that?"

"Bluh, at least she's getting dicked," Chloe laughed. She, more than the others, felt a pleasant tingle of arousal looking at Bryce. Shannon had, for sure, made quite the catch. Not too bright, maybe, but _god_was he sexy, with a perfectly sculpted body, and - her eyes darted downwards, inconspicuously - a cock that'd make porn stars jealous. The rabbit had, granted, had a few glasses of regular wine already. She'd insisted on it. It was the only way she could tolerate the kind of stuff Shannon made them watch, even if she enjoyed the company.

"See, Chloe's got the right idea. I'm sure he'd not mind demonstrating, either," Shannon grinned. "Would you, Bryce?"

"Huh? No, no, I'd love to fuck all of you," he blurted out. "Err I mean, god, yes, no-"

He buried his face in his hands, a sheepish look in his eyes. He was the only one who'd not been told that was exactly what at least two of Shannon's friends wanted. All of them were single, after all. Chloe had been thinking having children herself, only failing to find a suitable mate to give her some. Harper was a risk-taker, bordering on a nymphomaniac, who was too aroused by the idea of bare, risky sex too much to say no. Mia was the only one less than enthused, being that she'd never wanted to get pregnant. Sure, sex was great, but the little mouse was too career-focused. All that said, she did like spending time with her friends, and on top of that, she did notice herself feeling a little tingly looking at her childhood friend and her burgeoning motherhood.

"Oh, don't worry your pretty little head, nobody's expecting a cutie like you to do too much thinking," Shannon purred, reaching over to pat Bryce's head. "Just sit there and look pretty."

Bryce leaned into her. sIt was nice to have such a caring partner - owner, maybe - near her always made him get all excited, evident in both the way his tail thwapped against the sofa, and the obvious swelling in his pants. He rested his head against her chest as they started the first movie, though his attention was focused more to how she'd gotten just a little bigger after getting knocked up.

He wondered if her friends would let him breed them too. His cock throbbed at the idea. The older Bryce would've been too responsible to entertain the thought of knocking up someone he didn't even know just because she wanted a full belly, but more than anything, that felt like a very distant memory of someone else.

He stood up and moved over to the rabbit, hopefully. Chloe had arrived at Shannon's place not wearing panties, and every now and then she'd uncross her legs, making it impossible for the poor dog not to stare. It'd taken his slow mind a little while to realize it wasn't accidental. At least, he hoped it wasn't. She definitely didn't mind Bryce lifting her onto his lap, though she didn't say anything, focusing on - and laughing at - the movie as he wrapped his strong arms around her.

Shannon offered him one of those knowing smiles and he blushed again, but decided to press his luck. He really wanted to sink his cock into that pretty little slit between Chloe's legs. She didn't seem to mind being in his lap, at least, and the smell of her heat was driving him wild. Quietly, he unzipped his overly tight jeans (Shannon insisted that he wear them) and let his cock spring out, rock-hard and eager to put a litter into Chloe's womb. After the treatment, he hadn't really felt too confident, but situations like these were the exception, with all the excess testosterone really starting to pump through his body.

His shaft slapped against Chloe's thigh, and the bunny shivered but didn't move. That was enough consent for Bryce. She wasn't outright saying anything, but her wetness clung to his fingers when he reached down to cup her mound, and a small needy whimper escaped her lips when he slipped one into her. For a few minutes, he fingered her, right here on the couch, while she pretended to still focus on the movie. Shannon knew exactly what he was doing, of course. The other two hadn't noticed yet, the TV being louder than the wet schlick of his fingers pumping into her, curling against those clenching inner muscles, splaying to stretch her in preparation for his cock.

The other two noticed what they were doing, eventually. Just about at the point when he pulled his soaked fingers out of her and nudged his cock against her fertile folds. If not then, they definitely noticed when she moaned out loud when he thrust up and deep into her. Mia looked away, shyly, but Harper purred at the sight. Bryce saw her ears perk regardless when he started bucking his hips, bouncing the small bunny in his lap.

"Looks like Chloe's pretty ready to settle down herself," the tiger rumbled, nudging the mouse. "So how potent is he anyway?"

"Oh, really, really potent," Shannon replied. "He knocked me up despite having been milked for like, what, ten loads at least? Twenty? I lost track while we were doing it," she admitted, drawing a chuff from the tigress.

"Well, Chloe's got no chance then," she replied, looking at the rabbit, who in turn closed her eyes, trying to ignore her friends as she enjoyed the thick, bare shaft plunging into her equally unprotected sex. "Hear that, bunny? If you let him cream you're definitely gonna have some pups."

Chloe tried to formulate a reply but ended up moaning instead, which in turn made her blush a deep, crimson red. She couldn't deny that the dog's cock felt amazing inside her, like he was made for this. It was a tight fit, but luckily, she liked playing with oversized toys as it was.

"Honestly I was kind of hoping you two would, too," Shannon purred. Her attention was less on the movie now, and more on the very erotic display of her friend getting fucked. "I mean, it'd be easier if we were all mothers together, wouldn't it?"

"Pff, yeah," Harped chuckled. "I mean I'll let him fuck me into cumming a couple of times, but I think I'm a bit too old to get knocked up."

Mia said nothing, still trying to watch the movie. How would it feel, though, she wondered? If all of her friends were going to let Bryce knock them up, was she missing out if she didn't? Her pussy clenched at the idea. Twice so as her gaze was finally drawn to the mating pair, watching the expression of sheer rapturous bliss on Chloe's face as Bryce bounced her like a ragdoll. She looked almost limp¸ like a puppet supported only by the cock inside her. Suddenly, she moaned out, her climax drowning out even the movie - and almost simultaneously, Bryce's cock throbbed visibly inside her. A chill went through Mia's body as she watched the base of his breeding rod flex and pump. He was actually breeding her friend, right in front of the others. A breathless gasp escaped her lips.

Harper purred with appreciation. She'd already pulled off her skin-tight pants. The tiger had never had much in the way of shame, especially when with her friends. They'd caught her masturbating more than once during particularly saucy moments in whatever they chose to watch. With typical catlike alertness, she followed Bryce's movements as he stood up, hugging Chloe to himself, and carried the panting bunny off to Shannon's bed enjoy her afterglow.

He didn't bother trying to hide his still-hard shaft, soaked and glistening with their mixed lust. Either that, or he simply didn't think about it. Thinking was too much work, and he thought it seemed like the tigress wanted a turn, too. What he'd underestimated was how badly she wanted it.

The moment he sat down on the sofa, Harper pounced on him. He barked with surprise as the tigress, almost twice his size, pinned him to the cushions.

"My turn," she rumbled. Bryce shivered, feeling her claws prick his arms.

"Someone's pretty eager," Shannon giggled, nudging Mia herself. Not that she needed to. At this point, the mouse's eyes were practically glued to them.

Bryce thanked his lucky stars that he'd not gone soft, yet. He didn't exactly want to imagine disappointing the tigress. Harper gave a possessive, growling snarl as she almost violently impaled herself on the shepherd's cock, moving with such lusty enthusiasm that it made the entire couch creak underneath them.

"Gonna fill me with cum?" she growled, yanking her own shirt up enough to let her breasts bounce out, too, only to immediately squish them against Bryce's muzzle. "Better hope you didn't spend all of it on Chloe," she added, and Bryce could only reply with a muffled moan into her cleavage as she clenched around him, tight as a vice. Harper knew exactly what she wanted, and the poor dog had no say in the matter as her hips began to move, muscles rippling, the tigress trying her hardest to pound him into the ground.

He'd never been taken quite like that. Even when was being ridden, he ultimately felt like he was the one in control, like he was the one doing the fucking. Not this time. Sure, his cock was inside the tiger's squeezing pussy, but she was the one fucking him, effectively breeding herself on his cock, not allowing him to move a single inch.

"Give it to me, you little toy," she snarled, baring her teeth and thrusting herself deeply on Bryce's cock over and over again. She was big enough that his knot sunk in, and then out again, with each motion, a sensation so overwhelming that his eyes rolled back. "Fucking breed me."

He did, surrendering his cum to the growling, dominant cat. Harper yowled as she felt him throb inside her, and it was only then that she herself got her release. Harper clenched her eyes shut and shivered on top of him, her grip on his arms tightening enough to leave him bruised for sure. For a few moments, he felt her squeeze and milk his cock for what cum he hadn't already spilled into her, a deep rumbling in her chest.

"Good toy," she finally chuffed, and then flopped, nonchalantly, onto her back, stretching in the most feline way, luxuriating in the feeling of Bryce's seed sloshing around warmly inside her. Then, her eyes fixated on Mia. "You should have a go too, he's great fun."

"Y-yeah, but I don't k-know if I want to get... um, knocked up," she squeaked. Certainly she felt the desire to let the dog have his way with her. But she wasn't sure if she wanted the consequences.

"Hey, Bryce, come over here," Shannon called. Begrudgingly, Bryce obeyed. His pelvis cracked as he sat up. The tigress had left him a little sore, but there was still one woman left who he hadn't pleased, and he did have a duty to fulfil.

Shannon scooted closer to her nervous friend. "How about you just relax - Bryce, sit! - and let him make you feel good, hm? He'll stop the moment you want him to."

Bryce knelt on the floor, in front of the two. Mia was no less beautiful than her friends, even if she wasn't quite as curvy. Bryce did know, on some level, that he wasn't really one to speak, being that ever since his treatment he more or less found every woman incredibly hot. It was only natural, though, wasn't it? Sinking his cock into every pussy that needed to be brought to a shivering climax, without needing to think about it, felt great.

"Oh, just get on with it!" Harper groaned, her fingers idly stroking along her cum-soaked folds. "Getting fucked feels good. Thus; get fucked, Mia."

"Oh shush, let her enjoy it at her own pace," Shannon replied. "Well, Bryce?"

Bryce placed his hands on Mia's thighs and gently guided her legs apart. She smelled wonderful. Despite her reluctance and hesitation, the show had left her panties damp, and slowly, Bryce stuck his nose under her skirt. His cold nose brushed against the delicate, soft fuzz on her inner thighs, stealing little licks here and there - each rewarded with the with a little shiver from the anxious mouse - on his way towards that precious, warm prize between her legs. The fact that he'd never met her before didn't bother him any. If anything, he was thankful to get a break from mating, his cock still aching from the loving mauling the tigress had given him.

"Oh god, is he going to-" Mia squeaked, nervously, helplessly pawing at Bryce's big head, her breathing shallow and rapid. "O-ooh my goodness," she suddenly moaned, as the shepherd stuck his tongue out and gave the front of her panties a long, affectionate lick, taking in the mouse's scent. With such approval, and noticing that she was rolling her skirt up with trembling fingers, he quickly pushed the flimsy cotton to the side with his nose, only to press his muzzle right against her bare slit.

"See? He's such a good boy, eager to please," Shannon cooed, patting Bryce's head as he began to slurp, unhesitatingly, along the mouse's lips. He flattened his tongue against her taint, slowly dragging it up along her slit, only to press his lips around the rapidly stiffening, peeking clit at the top. It had the desired effect; Mia was soon whimpering and moaning, a terribly self-conscious look in her eyes as she grew wetter and warmer with each affectional kiss. She wasn't a virgin, but she'd never had anyone do _this_before, and it felt so good she had to lean against Shannon to even manage to stay upright.

But then, he stopped, standing up. Mia's eyes fell on his stiff cock again, and suddenly all that anxiety came back. No matter how badly she wanted it. She trembled, feeling like a deer in the headlights, realizing that his erection was all for her. All those brutish masculine urges, focused entirely on her petite body. Those plum-sized balls, still heavy with his seed despite two orgasms, eager to pump their virile cargo into her poor womb.

"Let him do his thing," Shannon purred. "He'll be gentle. Won't you, Bryce?"

Bryce nodded, with a little too much eagerness. He could still taste the mouse's honeyed nectar on his lips, and it was driving him wild with need to add his own cream to the mix. But he had to be a good boy.

Mia didn't say anything, but she was chewing on her lip as Bryce scooted between her legs - dangling limply off the sofa - and nudged his cockhead against her, letting her feel the firm, masculine heat on her petals. He wondered if it made her feel as tingly as it made him, the idea of letting him stroke his throbbing cock into her until it squired that puppy-making batter deep into her womb.

"J-just be gentle," she huffed, finally, wanting to at least try it out. With him having cum twice already, the risk couldn't be that high. And even if it was - at least he'd have all her friends to share the experience, woes and joys both, with.

Bryce, for his part, wasn't exactly in the state of mind to consider the consequences of knocking up four different women, three of whom were strangers to him. Not with how all his blood seemed to pool into his cock, leaving his already dim mind even lighter and emptier. All that mattered was that he was doing it, as that sweet, pleasured tension in his loins demanded, and that they were enjoying it at least as much as he was.

The little mouse quivered as his muscles flexed, letting her body slowly stretch around his studly girth. She was wet, at least. And with his cock painting her inner walls with his precum, soon more so. Still, it was like sliding into a very pleasurable vice. One that threatened to squeeze his seed out before he'd have the opportunity to even make the mouse orgasm.

Luckily, Mia was on a hair trigger after watching two of her friends get deeply creamed by this very same male now easing that potent, alluring, dangerous cock into her. It felt amazing, his sheer thickness_beyond anything she'd had before, stoking some primitive desire to be _claimed. She could barely breathe with how intensely she was focused on that rock-hard, veiny thing slipping into her, somehow just barely fitting, and what little breath she managed to draw hitched as she pictured the slit at the top pressing firmly against her cervix. He'd knock her up, too. There was nothing between them to prevent the dog from spilling his seed into her receptive body. And, Mia realized, she didn't care.

It only took a few thrusts. The first one made her moan out loud - both Shannon and Harper encouraging her to enjoy it. The second made her whole body sing with pleasure. It was a little embarrassing, Mia realized, to cum so quickly. The third slow, deep thrust set off that fluttering sensation of incredible tension inside her. And the fourth, fifth, sixth - as the dog suddenly sped up, purposefully and deliberately _fucking_her - pushed her over the edge. Just like her friends before her, she came, hard, juices gushing out over Bryce's bunched-up sheath, and the feverish, rhythmic milking was what Bryce had been waiting for before giving in, himself.

Mia felt a dull, throbbing heat inside her, as Bryce grunted with satisfaction. She knew what it meant, she could almost see his swimmers swarming her eggs in a heartbeat, changing her life forever. It was too much, far too much, in combination with her own, overwhelming climax.

The next time she had any coherent thoughts again, she was on Shannon's bed, her sex aching - a good ache, to be sure - with a couple of pillows under her rump.

Maybe it was all a little bit demeaning for Bryce, effectively being used as entertainment, but he really couldn't care any less. By that time, he was perfectly happy just being Shannon's pet stud. A mostly mindless, eager breeder for her to entertain any guests with. That, and he had a killer body. All in all, the experiment - whatever it'd been, he could barely remember - was a definite, resounding success. What other male could sire so many litters in just a few hours?

All three guests decided to stay the night. Why not, after all? The damage was already done, so getting to enjoy Shannon's pet in the morning too wouldn't hurt. As for Bryce? He definitely didn't mind.