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Mauser wasn't familiar with the struggle of being self-conscious at the gym.

He was used to being the center of attention enough that it didn't both him when there was only one machine open, and most of the time, he thrived in that spotlight, accepting the feeling of so many different sets of eyes on him as he pounded out another couple miles on the treadmill.

Late at night, with no one else around to see what he was seeing, he felt terribly self-aware, wishing that he had someone to commiserate with.

"You're not r-really suggesting what I think you are, are you?" he asked, looking up at a thick, brutally muscular man that had taken the place of his old friend, Ronald. "I know the place is mostly empty, b-but I'm not about to do that right in the middle of the floor!"

A massive paw wrapped around the back of Mauser's head and pulled it forward, forcing his muzzle right into the crotch of shorts that were stretched to the bursting point. "First of all, little man...you're gonna do whatever I tell you to if you know what's good for ya."

Mauser couldn't help sucking in a breath; he was intoxicated by a thick, canine musk in mere seconds.

"Second, if you're gonna address your elders with such disrespect, you will be sorry for it later. I'd suggest you start calling me 'sir' when you talk to me...although, since I'm your new daddy, I suppose that title would work just as well."

Kneeling and taking in whiff after whiff of fresh, sweaty aroma, Mauser wanted to make a joke about how kind Ronald was being for giving him a choice in the first place.

He wasn't dealing with Ronald anymore, however, and couldn't begin to guess how well that kind of joke would go over with such a large, domineering beast of a man.

"Can I...get some room to breathe?" Mauser finally asked, wishing that he'd offered a compliment before asking for it. "D...Daddy..."

There was hesitance in his voice that wasn't due to regret, but bashfulness; Ronald was glad to hear that, but then again, it wasn't Ronald that was listening anymore.

"Daddy Hans...has a pretty nice ring to it, don't you think?" he asked. Thick digits curled into thin headfur as Hans yanked back on Mauser's head, pulling him by flattened, submissive ears and forcing him to stare up into the eyes of a man that was well his senior. "Just don't forget to say please next time, little boy. I'd hate to have to teach someone your age some manners, but then again, I'd absolutely love the process."

Mauser was smart enough to realize that he was going to be punished no matter how the rest of the evening went, and despite the fact that a small, timid creature had transformed into a monument of rippling flesh in front of him, the gym attendant wasn't doing anything to stop the brazen activity.

Hans and Mauser may as well have been the only two people there, surrounded by gym equipment of every shape and size, all of them prepared to serve a much _naughtier_secondary purpose.

"Do I r-really deserve to be punished?" Mauser knew it was foolish to ask, but he knew he'd never be able to overpower Hans man to man. "All I did was try to help you get into better shape..."

"Looks like you did that in droves," Hans admired his own body as he tugged up with his one arm. Pain seared down the sides of Mauser's head, but the smaller, skinnier Doberman quickly shot up to his feet and trembled before the man who really could have passed as his father. "Got a little rust around the old iron, I'm afraid, but the 'dad bod' look is in this year, isn't it?"

Other than a full and rounded belly, every inch of Hans was riddled with muscle, to the point that his arms could easily have passed for Mauser's thighs. His appearance wasn't just for looks, as his every move was so powerful that Mauser was forced to comply along with it, even when the back of his head was finally released.

Gripping the front of Mauser's tank top was just as controlling; if the skinnier canine didn't follow along as Hans tugged, the fabric would have ripped effortlessly.

"You wear it well, Daddy!" Mauser's tone changed to panic as he stumbled along, having no chance to resist the makeshift leash that Hans was tugging on. "It's honestly, w-well...it's really hot."

"Don't I know it?" he replied with confidence that was just a step below arrogance, further arousing Mauser and leaving him on the edge of sexual frustration as he pulled the smaller canine to a weight bench. "But you're not gonna get out of this workout with a little flattery. You should really know better than that."

"So it's not a punishment, then?"

"No workout is a punishment if you think of the benefits it'll provide for your body later on," Hans claimed. "Of course, this one doesn't exactly fall in line with rudimentary weight training."

"Then what exactly are we doing?"

"Stretching."

Mauser let a half-hearted smile cross his lips. "O-oh, okay! That's not too difficult."

"That means you're not stretching yourself far enough," Hans suggested. "You probably go way too easy on yourself when I'm not around; it's a good thing you brought me with, after all! I can help you get some real stretching done this time."

Feeling stupid for not picking up on the double entendre until he saw a lustful, narrowed eye staring back at him, Mauser flattened his ears once more and tried to droop his tail flat to his backside.

"This...this isn't gonna be a workout at all, is it?"

"Not the kind you'd normally do in a public gym, boy. Get on the bench."

Mauser couldn't have moved to the bench any faster, but he was playing right into Hans' scheme as he tried to take a step forward, only to feel his thin, loose tank top ripping in the larger doberman's grasp. Fabric tore easily against the might of his grip, but when Mauser even thought of hesitating, he could feel a stern, cold stare urging him forward.

The quiet riiiip of his favorite top being ruined followed him all the way down to the bench, until he was flat against it, laying on his back.

"Oh, lose the damned frown already, would you? I'll just buy you another one if you liked it that much," Hans offered, taking to the 'dad' role exceptionally quickly. "I need it for something else, and I'm pretty sure you're not gonna complain about it."

"Maybe not, but now my back is cold..."

"You'll warm up quick," Hans assured him. "Now get your paws on that bar and get ready to do some real exercising."

Mauser knew he shouldn't have reached up. He knew he shouldn't have gripped the bar so tightly, or gotten carried away in his desires to please his new daddy figure.

None of that mattered anymore when one piece of tattered fabric wrapped around his left wrist, before it looped over the bar and restrained him.

"Wh...what the hell do you think you're doing?!" he started to panic as he yanked back, finding he didn't have the strength enough to tear the fabric.

"Making sure that you don't let go of the bar. Proper form is essential to a good lift," Hans could have come up with any excuse, but pretending that this was still a workout was the most enjoyable ploy of them all. "So don't you even think about pulling your other paw away...and maybe try showing me a little more respect if you want me to give you a proper warm up."

Turning back was no longer a viable option. Taking one last peek around Hans' girthy form to check on the front desk attendant, Mauser couldn't decide if he was disappointed that they hadn't reacted yet, or happy that they were giving the pair a veneer of privacy.

Either way, it didn't change his fate, as Hans wrapped the last of the tattered gym shirt around Mauser's right wrist, keeping his arms up over his chest even if he decided to unclench his fists.

"What...what did you have in mind for a warm up, daddy?"

Mauser was finally starting to play along enough that Hans wore a proud grin. He was chuckling as he stepped to the middle of the bench, letting the bulge of his junk hang over the middle of the bar and press forward, giving the bonded canine a face full of cock that was terribly enticing, but also well out of his reach.

"A little spit in the palms usually does the trick," he said, being crude about the act of lubricating Mauser's asshole. "But the most important thing is that you relax, and you're still all jumpy down there...I'm gonna have to figure out a way to chill you out before we get to the main event."

It was bad enough to have his tank top ripped so unceremoniously, but that was only a functional loss.

A loss of dignity came when Hans gave even less effort to the act of tearing away Mauser's shorts, ripping them apart in sections, allowing his claws to tatter the already thin fabric down to wisps that were scarcely held together.

The middle seam didn't stand a chance against the overwhelming might and muscle of the new Doberman, and from it, the last of Mauser's modesty was ripped away as his cock flopped free and his sack came into contact with the cool, smooth fabric of the bench.

"There we go...you'll be much cooler this way, kid."

Mauser bit down on his lower lip and stifled a whimpering cry, wanting to let out a shrill complaint about the cold pleather against his warm nuts. His sack tightened as his member stood upright and proud, defiant of the mental state he appeared to be in.

This whole thing was right out of his fantasy playbook, but somehow, Hans was the one calling all the plays.

"Something tells me you're not gonna let me cool off when this is all said and done," Mauser could already see Hans leaning down to the end of the bench. It was enticing to see him kneeling between his own open thighs, but there was nothing submissive about the act; it was merely the best approach that Hans could take to line his muzzle up with the underside of Mauser's rump.

Powerful digits wrapped clean around slender thighs and hoisted them up and back, folding Mauser's lower half over on himself with all the ease of a lawn chair. "I already vented your junk for you...what more do you want?" he acted as though he was being kinder than he truly was, even when they were both aware of how selfish he was being.

They were both entirely fine with that fact when the Doberman used his thumbs to spread Mauser's asshole wide open. A tail stayed flat against the bench and out of the way as a warm, wide tongue made a first pass over the warm, tender pucker, slicking it thoroughly and leaving it to contract at such intimate attention.

Hans could feel his little gym rat trembling in his grasp as the smaller canine shook the bench with his physical delight.

"That's...t-too warm to be a cool down," Mauser's continued protests were only going to bring him greater punishment down the line, but in the moment, Hans was having too much fun sliding his tongue up and down over the spot and watching it twitch in reaction. His tongue was plenty slick enough that just a few passes would have done the needed trick, but with a narrowed glare at the whiny pup, he wrapped that same messy muscle around a single digit, coating it to the second knuckle with saliva.

Even Hans was surprised at just how easily it slid in, but he snickered when he saw how tense the smaller canine became: his sack was taut , so much that there was hardly room for his orbs to move.

"No sense cooling down when we haven't started the real workout," he was glad to remind the little gym rat of their next move, even as the pleasures of the current one forced Mauser to twitch and writhe against the bench. "We're almost there, though...seems to me you're a little too eager to get going. You don't wanna _pull_something."

Mauser was sure that there was a pun to be made about stretching, but while his asshole was being taken to new limits by a second fingertip, he found it hard to make any jokes.

He found it hard to breathe at all without panting desperately, and still, the front desk attendant ignored whatever was going on across the gym, more concerned with a viral video than they were with Hans' naked body rising to stand over Mauser once more.

"Pretty sure w-we're more than warmed up by now," Mauser suggested. With one eye winced and the other staring up at the controlling Doberman, he was nervous to allow his gaze to fall to the simply impressive girth of his cock, but there was no avoiding it when the warmth of the same was already teasing along the underside of his sack and spilling precum into the gap of his rump.

Watching that drizzle as it mingled with the saliva and eased into the stretched passage, Hans was satisfied with the first part of their workout.

"Pretty sure you're biting off more than you can chew, but you've got an excellent spotter over you," Hans eagerly tooted his own horn as he hoisted Mauser up by the hips again, lifting his body into the coming thrusts. "For your own sake, don't let go of that bar...you're gonna wanna h-hold it...r-really tight..."

The words couldn't have been more fitting; Mauser's entrance had plenty of resistance left despite an eager gape, and the width of his anal passage was just a little undersized for the massive cock that was begging entry.

Like the forceful beast it was attached to, however, it refused to beg for something long.

It took Mauser's asshole, pushing past resistance and spreading the boy's body to fit the flesh and the occasion.

"Oooooh f-fuck," Mauser's response wasn't just pleasure, but mild panic as he felt his inner muscles struggling to keep up with the invasive rod. His insides did their best, but just as he was worried Hans might tear him in two, the Doberman started to ease back.

A sigh of relief was never able to fully escape: Hans only took a moment to spit on his own shaft before shoving it back in twice as hard, stealing the breath from Mauser and forcing him to grip the bar with such intensity, the white of his knuckles nearly pierced the thick coat of his fur.

That grip twisted as Hans wrapped his arms under the waist of the slender canine and kept him elevated, making for easier passage and providing a thrust that was too brutal not to hurt, but too pleasurable for Mauser to take without moaning its praises.

"Didn't think you were ready for the big weights yet," Hans confirmed his suspicions, but when his words implied a break, his body just kept going, pulling back and driving into the submissive gym rat once again. "But since we've already gotten started, we're gonna do the whole routine."

Legs curled and toes clenched onto the back of Hans' thighs; it was all that Mauser could to do try and gain leverage as his body was pounded into so mercilessly. "D...Daddy...I c-can't handle...t-this!" his cries were disjointed, each one torn asunder by the brutal depth and rapid pace of the Doberman above.

His entire body was bouncing against the bench as Hans fucked him into even greater submission, to the point that his once unbreakable grip was reduced to limp wrists, hanging from the ties around the bar.

That sign of quitting wouldn't stop Hans from getting in a full workout. "That's what you get for trying to go up the ladder before you were ready for the first rung," he was happy to scold Mauser as if he'd actually made a mistake. "So now, you're just g-gonna have to spot me while I f-fucking finish up..."

Pleasure was finally sneaking into Hans' voice as he leaned further over the bench, his shadow blocking out the light from Mauser's expression and forcing him to absorb the view of a musclebound monster of a canine.

He tried to suck in a gasp, but as Hans finally bottomed out and slapped his sack against Mauser's tender rear, no cry of earthly delight could escape him.

He was too full; it should have been terrible to feel it, but deep inside, his inner muscles were able to rest for a moment as Hans held still, content to enjoy the feeling of desperate, helpless clenching around the base of his shaft.

"Ready for that cool down that you've been bitching about?"

The amount of heat pouring of Hans' cock wasn't going to be soothed by a load of cum, but there was something utterly refreshing about the streaks of seed that began pouring inside of Mauser, as the warning was given.

He blamed what came just _before_that.

"­Yeeeeah..." Mauser could hardly speak without a lewd, pathetic moan passing his lips, but it sharply disappeared as Hans pummeled into his body with renewed speed and strength, pushing the bench further and further into the ground until it actually moved toward the wall. New, mild pain and unbelievable pleasure mingled in the strapped gym rat as the gym attendant finally cocked a brow at all the noise, and the slamming of the bench was quickly dismissed...much to Mauser's dismay.

His asshole was _terribly_stretched as Hans kept his body entirely still against the bench, forcing him to take the full force of every pass of thick, muscular hips. A wet, sloppy chorus of sounds emerged as cum violently burst inside of the smaller canine, and finally, the pace began easing up just a little bit, as if Hans really was treating the experience as an exercise.

Mauser, however, was the one panting desperately. Tears were formed in the corners of his eyes and nearly streaking down as his own, uncovered cock sprayed back on himself with a hail of precum, but he never properly achieved orgasm without a touch, leaving him jealous of the ridiculous volume of seed that poured out of his asshole and trickled over the bench.

He couldn't voice that same jealousy when he felt a thick, bulbous knot sneaking into his tailhole and spreading it even wider , taking advantage of Mauser's exhaustion. His body was too tired to even try to resist the weight of it, but the tie created was so perfect and strong that it was an even greater form of bondage than the bar itself; the defeated, submissive pup wasn't going anywhere until Hans was able to complete his own cool down.

"I dunno if this gym has what we need to really work you out," Hans claimed, catching his breath so much faster than Mauser that it made him a little jealous. "Maybe we can find a more private setup to bring you up to my level."

Knowing he didn't have a choice and quietly loving that fact, Mauser's lungs continued to burn and his muzzle stayed open as he panted out a brief, but all too eager, "Y-Yes, Daddy..."