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“Eric Johnson?"

The slim eighteen-year-old perched on one of the plastic chairs in the office lobby—the only person occupying the otherwise-deserted room—perked up. He looked to the nurse standing in the doorway just to the right-hand side of the long front desk. He smiled. “Here!" Then the young man stood, stretched, and made his way over. “All ready for me?"

The other young man—early twenties, brown-haired, and blue-eyed; fairly attractive, in Eric's honest opinion—glanced down to the clipboard in his hands, and then nodded as he met Eric's smile with one of his own. “Yes. Sorry for the wait, but we're ready to take you now." He stepped backward through the doorway. “Follow me to the exam room, please."

Eric did what he was asked readily and willingly. He was lucky, after all, to land a job at the city zoo's veterinarian office; a secure, three-month position with very generous pay and benefits. The listing had been vague about the details, but the young man figured that he would learn more once he was accepted.

And indeed, when he'd applied and later received the notification that he'd gotten the job, Eric did learn at least a little bit more: he was to report to the office for an inoculation against animal-borne diseases. That did seem to mean he'd be working with animals, at least.

It was a dream come true. Something Eric had been wanting to do since he'd been a young boy, tugging on his father's hand to drag the older, indulgently-laughing man from zoo exhibit to zoo exhibit. It was what he'd told everyone he wanted to do when he grew up, what he'd planned on studying to do when he went off to college in the fall; and at last, the opportunity was within the young man's grasp.

He trembled in anticipation. He took a deep breath in and then out. He nodded in greeting to the doctor when he was led into the examination room, trying to play it cool and not let his excitement show too much. “Hi there."

“Thank you, Dylan. And hello there, Eric." The doctor—dark of hair and eye, and with a bright and handsome smile on his face—gave Eric a nod in return. He shook the younger man's hand while his nurse—Dylan—moved towards the counter on the room's left-hand wall. “I'm Dr. Proeter. But since we're gonna be working together, just Richard is fine." The middle-aged man—a head taller than the eighteen-year-old, and with a good amount of muscle tone under his lab coat and polo—gave Eric a wink as a quiet laugh burbled in his chest; and once more, Eric found heat blooming upon his cheeks. “So then, are you ready to get started?"

“Yup." A swallow. A clearing of his throat. A—slightly strained—laugh of his own. Eric's gaze wandered around the room, trying to find something on which he could focus to settle his roiling thoughts. A few windows looked out towards the path which led to what he knew was the ape exhibit. Posters on the walls showed various parts of animal anatomy; gorillas, chimpanzees, and orangutans were most heavily featured. Aside from the counter at which the nurse was working—filling a hypodermic needle from a small vial—the only other furniture was a couple of plastic chairs, a small rolling table, and the main feature: the examination table.

Low. Small. Too small for a guy of his size, but if the doctor worked most often with apes, then Eric supposed it made sense. The straps—cuffs—at the head of it and the stirrups at its foot gave the young man a bit of pause; but again, on second thought, he supposed that it made sense. If some of the animals got squirmy during their physical exams and medical procedures, then the straps would be useful to keep them in place.

“So!" Eric grunted, and forced himself to meet the doctor's gaze once more. “Where are you gonna stick me, Dr. Richard?"

“Well, that's the thing." Dr. Richard's smile grew a little sheepish. “For this inoculation, we're gonna have to get it in you in the place with the most blood flow. Meaning your, ah… groin region." However, as he spoke, the doctor's voice remained smooth and confident. “Please take off your pants and bend over the examination table."

Eric blinked. He blushed. He gulped hard, looking from one—fairly attractive—older man to the other. The thought of them looking at his 'groin region', even if just to stick a needle in it, stirred a bit of heat in his belly while stoking the fire in his face to its maximum. “Uh, take them off?" Another nervous laugh nearly caught in the young man's throat. “Seems pretty invasive for just a, uh, a vaccination, doc…"

“I assure you, it'll help." Another nod. “Go on, we're all men here." Dr. Richard's lips curved into just the slightest smirk. “I promise you don't have anything I haven't seen hundreds of times before, Eric."

The eighteen-year-old huffed at that. But slowly, reluctantly, and shyly, he reached down to pop the button of his pants and unzip his fly. “Alright, Dr. Richard." Again he swallowed to wet his achingly-dry throat, turning away from the watching older man. And then he pushed his jeans and underwear down together to bare the smooth and hairless curve of his pert, perky ass. As he meandered over to the foot of the exam table—he'd have to practically lay himself over its entire length to 'bend over' it—Eric tried not to think about other 'examinations' he wouldn't mind the good doctor doing to his rear end. At last, after one final moment of hesitation, Eric kicked his shoes off and stepped out of his pants and briefs, spreading his legs a little bit while he assumed the position. “This good, doc?"

“Very good." The doctor's voice remained cool and professional—and Eric couldn't decide whether he was relieved or disappointed at that—while he and Dylan continued to move around behind the younger man. A brief, hushed conversation. Shifting and shuffling, the sound of something—the rolling table—being dragged up behind Eric. The distinct, unmistakable sound of latex gloves being pulled on; rubbery material stretching and squeaking over smooth flesh, and then a sharp, spine-tingling snap against the doctor's wrist.

The heat in Eric's face beca;me a raging inferno; and spread like a wildfire down to the pit of his stomach and over the expanse of his crotch. He had to press his thighs together and choke down an embarrassing whimper as he felt a throb down below. And when Dr. Richard set a latex-coated palm on the small of his back and cleared his throat, it took every ounce of the young man's willpower to not gasp and shudder.

“Sorry, could you keep your legs spread, Eric? I need to hit a specific spot, and I can't get to it unless you widen your stance."

A swallow. A nod. A soft, strained noise as Eric followed the doctor's orders. It was fine. Everything was fine. Dr. Richard had said it himself, there was nothing down there he hadn't seen many times before. He'd probably had a bunch of patients spring half-chubs while they were examined; it wasn't like the young man could control or even help it, guys' dicks often had minds of their own. He just needed to breathe in, and out, and let the doctor do what he needed to do.

At last, Eric felt a brief pinch in his crotch, right in the crease just behind his ballsack. Just a brief stab of pain, and then it was over; or at least, it should have been. Eric should have been able to stand up, get his underwear and pants back on, and laugh off his shyness over such a quick and easy thing with the doctor and nurse. He should have shaken Dr. Richard's hand, and been led by Dylan back out to the office so he could begin training for his new job. Everything should have been fine and dandy.

Instead, a surge of sensation through Eric's groin finally drew out a throaty groan from deep in his chest.

The place where the needle had gone in itched, spreading tendrils of fire out from the inoculation site to lap at his flushing flesh. His breathing grew shallow, becoming short and quick panting, and the heat and pressure in his face grew almost unbearable as he started to sweat. Dampness on his brow. Under his arms. Between his legs, where his balls were starting to churn while his half-chub pulsed and stiffened to full mast.

“What…" He blinked, trying to clear his swimming vision. Trying to get his lolling tongue back in order and regain control over his slackened jaw. Trying to grab onto his reeling thoughts as they slipped like sand through the clutching fingers of his mental grasp. Eric made a valiant attempt to push himself upright, but his knees had grown weak; shaking and trembling as the flesh of his crotch brushed against itself, sending sparks shooting up like arcs of lightning into his gut. “What was… in that shot? I feel… weird."

“Don't worry, you'll feel right as rain in a moment." A steadying hand—gloved; Dr. Richard's—took hold of his hip, and another—ungloved; Dylan's—grabbed onto his shoulder. For one wild moment, Eric was convinced the two—stronger, older, and pleasingly-muscular—men would push him completely down onto the exam table, and turn what was happening to him into one of the cheesy porn scenarios he'd briefly entertained while taking off his pants. “Just relax and remember to breathe. The reaction is a little intense, but if you just get through it, then we can start you up with what you were hired for."

What he was hired for. They hadn't ever come out and said it in plain terms. Eric gulped down the saliva which filled his mouth, and tried not to think about the warm, sweaty, tingling sensations in his groin. “That… shot. What…" Another gulp. Another moan. Another twinge of the gathering knot in his belly. “What's it actually for, anyway…?"

“Oh, just the usual infections and diseases you'd wanna be protected from in this job." That soothing voice and touch nearly got the younger man relaxed once more; and then what Dr. Richard said next tightened the vice around Eric's throat until he choked. “Herpes simplex, hepatitis B, papillomavirus, HIV…"

“Herpes? HIV…?!" At last, Eric managed to push himself up on unsteady arms to look over his shoulder at the doctor, wide-eyed and shivering as the fire in his crotch continued to merrily burn at his nerve endings. “What the fuck are you gonna be having me do that that's something I'll have to be protected from…?!"

“Why, having sex with the animals, of course." Casual. Flippant. Spoken as though he was talking about pushing a broom around for a couple hours.

Despite the roiling heat in his crotch, Eric went cold. He shook his head. He thrashed and wrenched himself out of the pair's grip, stumbling and staggering as he reached down for his pants and underwear. “No. No. That's not… I'm not doing that. You're…" His dry tongue flicked across his lips. “You're insane. I'm… I'm out of here. I'm leaving."

Eric's heavy head bobbed—along with the still-stiff and almost-aching shaft of his erection—as he tried to make his way toward the door. However, the nurse's hand closed around his shoulder once more; and then his other hand gripped Eric's bicep, keeping a firm hold of the swaying, groaning eighteen-year-old. “You can't leave."

A delirious laugh burbled from Eric's lips. “Just watch me, you… you…" He craned his neck, blinking and staring at the much-taller man. Was the nurse growing bigger? All of a sudden he was looming over Eric, large and imposing; and getting more so by the minute as his vice-like fingers gripped the other young man's—suddenly extremely loose—shirt.

No, Dylan wasn't getting bigger; Eric was getting smaller.

That fire—that insistent itching—in his loins spread to consume every inch of him. He felt hot. He felt sweaty. He felt hairy; like the light dusting on his forearms and legs and pubic expanse was growing thicker. Heavy. Becoming a pelt of fur which extended across his chest, down his belly, and over his groin. Up over his shoulders and neck and around his back. Across his cheeks and forehead, meeting and fusing with his hairline.

And at the same time, his upper and lower jaw and nose pushed outward into a broad, flat, leathery-skinned muzzle. His palms and fingers and soles grew leathery as well, black and rough. Fur coated the backs of his hands and tops of his feet, and his brow grew large and heavy.

“What… what's happening to me…?"

“Don't fight it. Just relax." Dylan held the squirming, wriggling younger man—the ape; that was what Eric had been turned into somehow—close and tight, working Eric's shirt off to leave him completely nude. “Looks like the reaction occurred faster than anticipated, doctor."

“Mmhm. Those lab boys really are working wonders." Dr. Richard nodded.

The shot. The 'inoculation'. It had done something to him, turned him into what he'd become.

They'd lied to him.

“Bring him on over here, and we can start his physical exam. The gorillas have waited long enough for us to find a bitch for them."

“No… no!" Struggling. Thrashing his suddenly-too-long limbs. Trying desperately to fight his way out of the nurse's hold on him. But it was no use; Dylan just picked the shrieking, wriggling ape up, as easy as hefting up an unruly child. Carried him over, arms wrapped tight around Eric's midsection. Plopped him down onto his back on the exam table; and then pressed his palms to the transformed man's chest and gut to keep him pinned in place.

His legs were spread and fitted into the stirrups at its bottom, and the cuffs were secured tight around his ankles. The straps at its top held his arms up above his head. Eric was strapped down, a squirmy animal being prepped for his exam.

And despite the confusion, the terror, the sheer madness of the nightmare into which he'd been plunged, the fire in his groin stayed lit. The roiling in his balls continued; and the dank humidity in his taint had spread down between his furry asscheeks to the taut, clenching, puckered ring of his hole. And his erection—hard and dribbling and pulsing in time with his racing heartbeat—stayed at full, throbbing mast.

“Please..." Reeling. “Please, let me go…!" Panicked. “I won't tell anyone about this, just please stop. Please…!" Hyperventilating as he tugged against his bonds and stared up at his captors, wet heat pricking his eyes.

But Eric's pleading and begging went ignored. “Can you hold his mouth open, please?"

“Yes, sir."

“No! Ngahh!" The nurse's firm grip remained merciless as one hand pressed to Eric's brow, the other took hold of the ape's chin, and Dylan pulled the former human's mouth wide open. “Glugh! Legh meh gugh!"

“Shh. Shh, Eric. Relax. It's okay." A latex-coated palm caressed Eric's cheek, and for just a moment the ape shuddered in something other than fear. Then two probing fingers traced over his lips, pushed down to feel along his gums and teeth, and finally delved into his open maw. “I just need to feel around in here for a moment. Make sure everything's in order."

“Gnugh…!" His tongue pressed back against those gloved digits. The distinct, rubbery flavor of latex filled his mouth. Eric groaned, and blushed, and tried to keep his mind from wandering away. In any other situation, he might have enjoyed what was happening to him; and the thought was like a punch in his gut, adding a generous dose of shame and embarrassment to his distress. In fact, his cock seemed to enjoy the situation just fine, the traitorous length jumping and spitting out thick globs of precum onto his fur-coated belly as Dr. Richard felt around every inch of his oral cavity. Top and bottom. Over the insides and crannies of his cheeks and gums. Even down towards his throat, teasing around and over the opening of it; and when those fingers made an attempt to push through into the ape's gullet, Eric gagged and groaned and involuntarily swallowed around them.

“Good. Very good. Nice and healthy." Dr. Richard nodded in approval, and finally pulled his hand away. “Your tongue and throat feel particularly good, Eric. I believe the gorillas will enjoy receiving oral sex from you. Along with the rest of the animals…"

“Guh… you're insane…!" When Dylan at last released his jaws, the former human made a show of spitting and grinding his tongue on his teeth while glowering at the doctor. “If you think I'm gonna suck monkey dick, you can go straight to hell! Now let me out of here and change me back!"

A heavy sigh and a roll of his eyes. Dr. Richard shook his head and shot a rueful glance to his nurse. “Looks like he's gonna need some more training. Dylan, could you get him muzzled for the time being while I finish his exam?"

“Sure, doctor."

“No!" Again, Eric pulled against the straps keeping him in place in vain while the nurse turned and made his way back over to the counter. “Let me go! Please!" Dylan rifled around in one of the drawers, pulling out both a leather veterinary muzzle and what looked suspiciously like a ball gag. “Help!" The former human began to scream as the young man approached once more. “Somebody help me! Hel-mmf!"

First the ball gag was forced between his jaws, Dylan's deft fingers quickly wrapping and securing its straps around the back of the ape's head. Then the veterinary muzzle was put in place over it, keeping the former human's mouth firmly shut. Eric continued to yell and curse out his captors, the sound muffled and faint through the leather and rubber.

“There we go. Nice and snug." The nurse gave Eric a gentle pat on the head, and then looked over to Dr. Richard. “Need anything else, sir?"

“No, thank you, Dylan. I'll take it from here."

Dylan nodded. He gave one last friendly—at least, the nurse seemed to think so—smile to the glowering former human. Then he turned and made his way out of the exam room, and Eric was left alone with the doctor.

“Alright, let's begin the real fun part." With a chuckle, Dr. Richard peeled his gloves off and tossed them into the nearby trashcan. Then he pulled out another, fresh pair, stretching them taut before snapping them at his wrists once more; Eric prayed that the older man hadn't noticed the way his cock twitched at that. “I'm terribly sorry about the deception, by the way."

Eric huffed; the bastard didn't sound sorry in the least.

“You see, for a while now, we've been looking for some way to keep the animals in our zoo happy, active, and sexually healthy." One latex-coated palm settled on the former human's slim chest—so tantalizingly close to one of the pert, perky, leathery black nipples which poked out from the ape's fur—and began to stroke; what he likely thought was a calming and soothing gesture. “Give them an outlet for their urges which won't result in overbreeding, or require them to have unsupervised sexual encounters." The smile returned to his face as he looked down to Eric. “And that's why we sent out that ad, hoping to find someone who'd be able to provide that for them. Of course, it does require a little bit of physical alteration… After all, we can't have the animals becoming sexually attracted to the human staff and causing problems, can we?"

While the doctor tittered, light and amiable, the former human let out another string of muffled profanity; curses, threats, and rude insinuations about the older man's lineage and familial relationships.

“Of course, we had to alter a little bit more than just your appearance to make sure you'd be a good fit." Dr. Richard's hand began to wander lower. Over Eric's stomach. Down to the crooks of his thighs. Brushing against the erection which rose like a proud and shameless monolith of lust from the dense forest of the former human's furry crotch. It was average-sized—maybe a little bit smaller—with a plump, ample glans crowning the shaft. The doctor wrapped his hand around it, and gave the throbbing member a teasing squeeze. “You've got a pretty nice cock, Eric. To be honest, I've been wanting to get my hands on it since you pulled your pants down." A laugh, and a smile, and a flirtatious wink.

The ape grunted. He glared. He ignored the burning in his transformed face; but he couldn't stop his hips from bucking upward as Dr. Richard began to stroke him.

Up and down, from base to tip. Up and down, the generous dribbles of precum leaking out of it providing plenty of lubrication for the doctor's gloved hand. Up and down, the friction of rubbery latex on his cock-skin sparking sweet pleasure in the former human's length. Eric clenched his eyes shut against the surges of sensation which arced like lightning straight into his groin. The twitching. The throbbing. The pulsing.

And then Dr. Richard's free hand cupped Eric's sack, hefting and fondling the firm orbs within the furry pouch. Rubbing against them. Giving them a gentle, insistent kneading.

“Nice balls, too. No lumps or other deformities." Another quiet laugh. “I can say without a doubt you're quite the healthy young ape, Eric."

“Mmgh… fmmf… mm…" The former human tried to breathe. Tried to ease his tensed muscles and limbs. Tried to keep his scattered thoughts in line. It felt good; both the stroking and the feeling of latex on his cock got the ape going. And Dr. Richard—despite being a dirty, lying, sick fucking bastard—was pretty attractive indeed; at least, he ticked pretty much all of Eric's boxes. In any other situation, he might have enjoyed being tied up by the older man and molested by those gloved hands of his.

Rubbed.

Pumped and squeezed and fondled.

Eric grunted. He shifted and bucked his hips. His jaw clenched around the rubber of the ball gag in his mouth. Even as the pleasure in his crotch stirred like a turbulent tide, there was no gradual build up to an eventual release. No spring-coil winding tighter and tighter until it snapped. No matter how long the doctor spent jerking the ape's cock; another minute, and then another, and another.

At last, Dr. Richard let out a grunt of his own and gave the former human an approving nod. “Good, it's working. As you've probably noticed, you're no longer able to orgasm from stimulating your penis." He laughed at the ape's glaring, and patted Eric's stomach. “We needed to find a way to discourage you from masturbating, since you'll need to put all your focus into having sex."

So he'd no longer be able to jerk off, no matter how much he wanted to. The ape let out a long, muffled, despair-filled groan.

“Now now, don't be like that. After all, there's one more alteration we made. And I think you're really gonna enjoy it." With that and another wink, Dr. Richard's hand moved down further between Eric's splayed legs. Two rubber-coated fingertips prodding and pushing against the puffy, flushed, sweat-damp expanse of the ape's taint. Stoking that fire in the former human's loins once more as they moved down.

Down.

Pressed against the hot, clenching, puffy and oversensitive ring of his asshole; and sent sheer mind-numbing pleasure shooting up Eric's spine into his brain.

Good. So good. Better than jacking off, or fingering himself, or even the one or two times he'd hooked up with another guy. The ape shrieked into his gag, his entire lower body jerking and rocking at the sheer sensation that latex-gloved touch sparked within him.

“That's right, there we go." Swirling around and around the slick rim; not slick from sweat, but from some kind of oily secretion seeping from the flesh itself. “Your anus and prostate have been modified to be a lot more sensitive, and to produce a natural lubrication which will assist with penetration." Kneading against the taut—but so very receptive-feeling—center of that stinging, itching, tingling pucker; every touch against it made the ape thrash and whine in coerced pleasure. “We do want you to enjoy your job, after all." Finally pushing against that ring, and sliding into Eric like a key fitting into a lock; the former human's inner walls wrapped tight around the doctor's digit, practically suckling on it as it sank into Eric's back passage.

Eric screamed again; his balls were roiling, and drawing up, and his cock was moments from erupting all over himself. He'd never felt like that before; like the mere touch of something against his insides would send him into an orgasmic frenzy. The former human just wished it wasn't the bastard who'd turned him into an animal who was making him feel that way.

Dr. Richard pushed his finger in deeper. Deeper. Hilting it to the knuckle, and then wriggling it around to explore the ape's most intimate area. “Hm… feels nice and hot inside here. Might need to put you to work helping the staff blow off steam, too." Eric choked on his own saliva at that, and tried as hard as he could to glare at the doctor; he wasn't a fucking cheap whore that his captive could pass around. But then the older man's latex-coated digit found the firm, burning bud of his prostate, and the former human's every thought was lost in a blinding flash of white through his mind. From far away, he could hear the doctor's voice. “Good, your prostate's nice and healthy, too. And the sensitivity seems to be at just the right level…"

That finger worked in and out of him. In and out. Pushing and pulling against the needy vice grip of the ape's inner walls. And then Eric felt another finger sink into him. And then another.

He whined. He bucked. He looked up through teary, narrow-slitted eyes at the older man, begging without words; to be let go, to be turned back into a human, to be fingered hard and deep until he finally blew the load churning in his balls all over himself.

“I see you like the idea, hm?" The doctor chuckled and leaned in close, staring right back into the ape's eyes as he continued to probe around in Eric's rectum. “You want me to fuck you, Eric? You want Dylan to fuck you?" He smirked. “I bet you were thinking about it earlier when I told you to bend over, weren't you? Wanted me to spread your cheeks and give your fine little ass a nice, thorough 'exam', didn't you?"

He wanted to deny it. He wanted to spit in the bastard's face, and punch his lights out, and kick his teeth in. He wanted to fight against what was being done to him. But as Dr. Richard's digits slid free from the clamping grasp of his ass, all Eric could do was whimper and squirm in forced sexual bliss.

The doctor hummed, peeling his second pair of gloves off and tossing them in the trash before pulling on a third. “Well, I guess I do need to make sure you're completely ready for the job." The pop of a button and the zipping of a fly being undone dragged Eric's mind from the abyss into which it had been plunged, and he stared with mounting horror—and simmering, reluctant arousal—as Dr. Richard pulled his own pants open. Pushed them and his boxer-briefs down off his hips. Bared the girthy length of his large, thick, throbbing erection.

Eric moaned. As much as he hated to admit it, the sight of the older man's cock got his hole twitching and winking with desire to be fucked by it.

“There we go." Dr. Richard grasped his shaft, giving it a few pumps to smear the precum gathered at its tip all along it. “This what you want, boy?" He shuffled forward with his discarded garments still around his ankles, moving between the former human's legs to position himself at Eric's entrance. “You wanna get fucked in this hot little hole of yours?" He brushed his cockhead against the ape's pucker, smearing the slick 'natural lubrication' which coated it all over the fleshy glans, and then prodded it right against the center of his captive's ring. “You wanna be the zoo cum dumpster?"

The ape wriggled. He clenched his eyes. His cock jumped and spurted once more, soaking the fur on his belly and crotch with his own precum, and let out another whine through his gag.

“Thought so." With that, Dr. Richard pushed his hips forward to sink his manhood into Eric's passage. Deep. Deeper. All the way to the hilt. And then, without waiting for a single second to allow the former human's floundering mind a chance to fight the surging tide, the older man began to thrust.

Out and then in, angling his curved shaft just right to let it grind over the ape's prostate with every pass; and when the sensation made Eric let out another scream of involuntary delight, the older man crooned in approval. Out and then in, his gloved hands moving to grasp and knead and squeeze Eric's chest; to tease those rubber-coated fingertips over and around the former human's nipples, pinching and tweaking them and adding yet more sparks to the inferno burning within his captive. Out and then in, winding the spring-coil within Eric's groin tighter and tighter with every slam of his hips against the ape's pert, perky, furry ass; every smack of his balls onto the puffy, sensitive rim of Eric's clenching, squeezing hole.

At last, that spring-coil snapped. The tide engulfed him, and the fire consumed him. Eric came, letting out one last scream into his gag with everything he had.

Spurting. Gushing. Erupting. His cock jumped again and again, shooting out thick ropes of semen onto his pre-drenched stomach; even up to his chest, and one or two shots even splattered on the former human's chin. He reeled and writhed in his bindings, feeling the pounding against his ass quicken as his orgasm spurred the doctor on to his own.

In and out. Harder and harder. Faster and deeper, until—with one final groan of completion—Dr. Richard hilted inside of Eric and came as well. The former human could feel it—feel the rush of wet, sticky heat—on every single inch and nerve ending of his inner walls. So good. So right. So pleasant, almost addictive as it sent one final shudder of warmth through his entire trembling body.

The pair panted and groaned, staying still for a long and breathless moment. Reveling in their respective afterglows. Sighing to each other as the fires in their respective crotches burned out to smoldering embers.

“Mm… fuck…" With a smile, the doctor gave the shivering ape's heaving chest another few gentle, tender, affectionate strokes; then he cupped Eric's furry cheek, and stared right into the former human's hazed eyes. “Yeah, you're gonna be perfect for this job. And I know you're gonna love it."

Eric bit his lip, looking away from the older man. He gave his slackened limbs one more tug, made one more vain attempt to free himself, and then settled into a sulk.

“Come on, don't be like that." Dr. Richard grunted. He huffed. He pulled his softened shaft out of Eric's still-twinging hole—sparking the fire within the former human once more, a flare of sensation giving him another punch in the gut—and stepped back. After grabbing a few tissues to wipe the cum and smut off his cock, the doctor pulled his pants back up and tucked it away. “This job's got a lot of perks when you think about it. Free room and board, three square meals a day… all the stimulation you could ever want…"

As the older man spoke, he made his way over to the counter. Rifled around in a drawer. Searched for something.

All the while, Eric kept his gaze locked onto the tile floor, mind muzzy and thoughts unfocused; unwilling to—refusing to—acknowledge what the doctor was saying, or what had been done to him. And so, he was caught off guard when he felt another sharp pinch—this time in the side of his neck—and the fog which filled his head became a smothering darkness.

“You'll see what I mean when you wake up."

Eric raged against the dying of the light. He shifted and shook his swimming head. He blinked his heavy eyelids, groaning in protest.

When the ape next awoke, he was staring up at the black, star-filled sky. His arms were down at his sides—uncuffed—and his legs had been freed of the stirrups. He was no longer on the exam table; he wasn't in the examination room in the vet's office at all. The former human was lying on the ground outside.

With a groan, Eric forced himself to sit up. With a quiet whimper, he lifted a hand to rub at his sore jaw. With a heavy sigh, he glared down at his still-erect cock as his balls roiled and his pucker itched.

Hot. Insistent. Needy.

The former human ignored the burning of his cheeks and the pulsing in his groin as he looked around. He was in the gorilla enclosure; in the darkness, and from such a new and different angle, it took the ape a good long while to recognize his surroundings. There was the tree with the tire swing. There was the concrete moat which separated the patron pathway—so high above—from the animals' habitat. And there, behind him, was the faux cliff where the gorillas made their home.

“Hello…?" He coughed and swallowed, grimacing at the weak and warbling sound of his own voice. “Hello? Someone? Anyone!" Again and again he called upward, staring at the walkway in the vain hope of seeing a friendly face peer over into the enclosure; in the vain hope of being heard and found. By a loitering zoo patron—he was pretty sure it was way after hours—or by one of the zookeepers—not all of them had to be in on what had been done to him—or by someone—anyone—who could help him. “Please, I'm down here! Get me out!" Hell, he'd even be glad to see that bastard doctor or his nurse; considering his position, he wasn't exactly above begging.

But Eric was alone in the dark, deserted zoo. There was no one who would rescue him from his predicament. No one who would call the police for him. No one on the outside who'd know about his disappearance. He'd left home to strike out on his own—his parents knew about the job, but not at all about any of the details—hadn't bothered looking for an apartment—why would he, when the job had offered a place to stay for its duration—and hadn't been in the city nearly long enough to meet anyone he could call a friend. There was nobody who knew where he was, or what had happened to him.

Well, nobody human, at least.

As Eric took in another breath, ready to cry out a few more times, he heard a deep grunt from behind him. The ape froze, choking as his dry throat clenched down on his desperate cry for help. And when he turned around, stiff and shaky, he saw them: his voice had summoned a pair of glowering, sleepy-eyed gorillas from their lair.

Massive and musclebound, intimidating in their hunched stature. The silvery fur down their backs glinted in the moonlight. And the eyes under their heavy brows were filled with almost-human intelligence as they looked him up and down. So much smaller. So much weaker. And sporting a shameless, throbbing, dribbling erection between his slim, fur-coated thighs.

The pair hooted and grumbled to each other as they knuckle-walked over, looming over Eric. The former human stumbled backward and fell on his rump, whimpering in distress; and whining as the itching, twinging, insistent heat in his hole and taint and churning sack made itself apparent once more. One of the gorillas sniffed at the air, snorted something to its companion, and reached out to grab Eric's ankle. Yanked it upward. Started a snuffling search for the source of that smell which had caught its attention. Meanwhile, the other gorilla murmured something vaguely tender to the former human while shifting its bulk over to his right-hand side, then took hold of Eric's head in its gargantuan, leathery palms.

Something that Dr. Richard had said tickled the back of the ape's mind. Not to him, but to that nurse of his, Dylan. The gorillas had been waiting for the doctor to find a bitch for them.

As Eric shivered and took in a sharp, hissing breath, he caught a waft of heady animal scent in the air; bitter and spicy, and overwhelmingly masculine. Then, with another quiet whimper, he peered down between the splayed thighs of the gorilla who was examining his groin; and he finally saw the erection which had risen from the—very male—primate's own crotch.

Stout—not particularly long, but exceedingly girthy—and iron hard, sticking straight up. The coal-black, almost-humanoid shaft was crowned with a plump glans, and perched above a hefty fist-sized ballsack. As the former human watched, it jumped and drooled out a glob of pearly precum which ran down the pulsing underside of that length; and when he turned away from the sight, mind reeling with horror at this fresh sexual nightmare, he found his face inches away from the other gorilla's pungent package.

And the other gorilla—still crooning out a soothing rumble and holding Eric's head in a tender, yet firm grip—was pushing his hips forward to bring his stiff, dribbling cock closer to the former human's face.

“No, please…" Batting it against his cheek. “Please, don't…" Grinding the throbbing, musky shaft right against his nose, and smearing his lips with slick pre. “Plea- mmgh!"

Shoving it into Eric's mouth and throat to the hilt, while his companion slipped his own erection into their new bitch's burning, ravenous, needy back passage.

---

The gorilla pair fucked Eric long into the night, pumping into him from both ends and filling his gullet and ass with their generous, sticky loads. To the former human's shame, he came from it as well; the feeling of those wide members stretching his sensitive hole and inner walls and filling his suckling mouth was nearly addictive as it surged and sparked and thrashed throughout his entire shuddering body. When they were done with him, they dragged him into their—surprisingly-comfortable—den to meet an even larger, even-more-hung alpha of a gorilla.

And when the zookeepers found him the next morning, panting and cum-soaked all over his crotch and down his chin and chest, he was still being rutted hard and fast and deep by that virile stud.

And so, that was how Eric began his job—began his new life—as the zoo's designated cum dumpster. He was taken from enclosure to enclosure—away from the public's eyes, of course, more often than not being placed right into the animals' sleeping area—to be ravished by cock after big, fat, bestial cock. By the other primates—the chimps, the bonobos, and the orangutans—and even by the various monkeys. By the wolves—gray and timber—and the African wild dogs. By the lions, the tigers, and the bears. He even sucked the monolithic erections of the larger species—the giraffes, the rhinos, and the elephants—though he'd often need a staff member on hand to assist. And as for the really dangerous animals, all it would take was a single look, or sniff, or curious taste of his puffy, reddened pucker to turn any hint of aggression into raging, furious lust.

Dr. Richard ended up making good on his word to let the other staff in on it as well. In between, as the ape was being taken from assignment to assignment, the zookeepers—and the cleaning staff, and the other veterinarians and nurses—would pull him aside to offer their—hairy and smooth, cut and uncut, large and small—manhoods to the former human. And no matter how much he begged, and pleaded, and cried, they'd simply tell him to do his job while forcing his mouth or hole down onto their eager shafts.

Of course, the ape was never allowed to masturbate. Jerking off didn't work for him anyway, since—as the bastard doctor and other staff who used him were more than happy to demonstrate over and over again—jerking his cock merely agitated the churning tide and stoked the blazing inferno in his groin without ever giving him a sweet, satisfying, merciful release. The only way the former human could cum anymore was to have his ass played with or fucked; and the one time he'd tried doing it himself, finding an out-of-the-way corner to shamefully finger his hungry ass, he'd been punished severely for his transgression.

A short and thin—too short and thin to stretch or stimulate his inner walls and swollen prostate in any meaningful way—plug had been pushed into him. It had been secured with a harness around his waist, so he couldn't pull it out or otherwise have it removed. He'd been left like that, stewing in his own aching, ever-growing arousal until he was a panting, drooling, whining mess of sexual desire. Only then had he been released from his torment, the plug taken out and he himself taken to the staff break room to spend the day servicing anyone and everyone who came by.

Eric never tried fingering himself again after that.

Of course, it wasn't all bad. The promise of room and board and three square meals a day was fulfilled; the former human was given a living space all his own where he could rest and recuperate. It was even well furnished, with a comfortable bed—big enough for him and any 'partner' who invited themselves into it—and a couch—ditto—and tv. And as for food and water, his quarters were outfitted with large feeding tanks like one would find in a hamster cage; at least they weren't metal bowls on the floor like one would give a dog. He'd groaned and grimaced when he first caught sight of them—especially their extremely-phallic nubs, molded to look exactly like penis heads—and again when he saw what exactly they were feeding him—warm, thick, viscous white nutrient paste which looked for all the world like semen; and felt like it too as it clung to his tongue and throat—but eventually grew used to using them. To like using them. To kneading and squeezing his almost-constantly hard cock while lapping and suckling upon them, switching from one to the other like they really were a pair of dribbling erections.

And so the days went on, and Eric settled into his new routine. One month passed, and his defiant resistance eased into sullen acceptance. Two months passed, and his reluctance turned to eager enthusiasm. Three months passed, and the former human became a cum-guzzling ape slut.

He loved having sex with the zoo animals, worshiping every size and shape of bestial cock with his tongue and throat and loosened, sensitive fuck-hole. He loved being the staff cum dump. And he loved being called by Dr. Richard—eventually just 'Richard'; or 'Daddy' when they were alone in Eric's living quarters—into the veterinary office for his weekly long, hard, deeply-intimate physical exam.

---

“Eric?"

“Mmngh…?" The ape blinked and dragged his mind from the deep, turbid mire of lust which had consumed it. Once more, he was lying on his back upon the exam room table, legs and arms secured in the stirrups and cuffs at its foot and head; the straps weren't strictly necessary anymore, but being bound and made helpless never failed to get his cock hard and his pucker hot and sopping wet. Once more, his jaws were held open and secured in place; not with a muzzle and ball gag, but with Dylan's—long and girthy—erection hilted within his gullet. Once more, he was being probed by Dr. Richard's latex-gloved fingers; they delved in and out and swirled all around the rim of that deep and hungry pit which had once been the former human's pert asshole.

He tapped on Dylan's thigh. He groaned as that turgid shaft was pulled free to let him turn his head—reluctantly—away from that musky pubic patch and those heavy, chin-battering balls. He looked up to the older man, still bucking his hips to grind those intruding digits right onto his tingling pleasure bud.

“Yes, sir?"

“It occurs to me that you're coming up on the end of your contract period." He wriggled and scissored his fingers apart, teasing the ape's ring and inner walls, and then pulled them free. When Eric whined and clenched his aching hole around the sudden emptiness, the older man gave his furry stomach a few slow strokes to calm him down. Richard then reached over, picking up an anal thermometer off the rolling table at his side, and slipped it deep into his patient's ass.

Eric sighed in bliss as the smooth, cool glass soothed the burning itch within him. Then the doctor's words penetrated the fog of arousal which had smothered his thoughts. “Wait, the end of it?"

“Yes indeed." Richard hummed as he rubbed Eric's belly, keeping an eye on the thermometer. “The job posting was for only three months, after all. I'm sorry for not telling you." He glanced up to meet the ape's slack-jawed stare and winced. “If you knew that there was an out waiting for you, then it's likely you would've just sulked all throughout your tenure before going to the police as soon as you were changed back to a human."

“You… you can change me back…?"

A nod. “Well, yes." A brief chuckle. “There may be a few lingering aftereffects—increased body hair and libido—but it's just another quick little shot." A sigh. “All we ask is that you sign a nondisclosure agreement and promise not to get the authorities involved, and we can have you turned back to normal faster than you can say-"

“No."

It was Richard's—and Dylan's—turn to blink in surprise. They shared a glance, and then both men looked down to the smiling ape lying prone—splayed out like the little slut he was—on the exam table. One of the doctor's eyebrows perked upward. “No?"

“No." Eric shook his head. “I love it here. This… honestly, it's the best thing to every happen to me." He let out a flirtatious, provocative moan, and then turned to press his face back into the crook of the nurse's thigh. “I wanna stay here. I wanna keep being fucked, by you and the rest of the staff and all the animals. I… I wanna keep being the zoo cum dumpster." He tongued Dylan's silky sack, and dragged his nose along the young man's length, and wrapped his lips around its tip to resume his bobbing and suckling.

Dylan moaned, thrusting into that eager mouth. Richard laughed, giving the ape's stomach one last gentle pat. Then the doctor reached down, grasped the thermometer, and began to work it in and out of his patient's pucker. “Alright, Eric. But just let me know if you change your mind, alright?"

“Mmngh… haah…" Again the ape latched off of his thick, throbbing, throat-filling 'gag' to answer, grinning up at Richard. “Alright, doc, I'll let you know. Now stop teasing me with that thermometer and fuck me already!"

With a laugh, the doctor pulled the thin glass tube out of Eric's clenching passage; and with an affectionate croon, he replaced it with his own long, pulsing, pre-drooling cock.

Of course, Eric never did change his mind. He never resigned from his position as the zoo slut, spending months and then years having sex with any animal or staff member who needed their cock sucked or their balls drained. He never asked—or even thought—about being turned back into a human and returning to his dull, directionless former life.

Why would he, when the perks of his job were so achingly, addictively good?