The sign above the entrance read “Bear Back” in big red letters over the muscular back of a flexing bear with “Predicament Gym” underneath in a smaller font.  The sign wasn’t sexual, but Myst couldn’t help but feel stirring in his shorts from how detailed the logo depicted the sweaty bear's form.   

Myst, the purple otter, shook off his horny thoughts as he entered below into the small closed off reception area plastered with the same logo as outside.  Two huge grizzly bears were working behind a counter.  One was checking an equally huge bear’s ID before waving them through.  Myst stood in the entrance, internally debating how distracted he would be surrounded by sweaty hot bears and if he should turn around now and avoid something embarrassing in the middle of the gym.  

“Hey Otter! Can I help you?” said the deep voice of the bear behind the counter not checking IDs.  This bear was tall, wide, and stretching out an XXXXL tank top with a thick gut.  His thick brown fur was smooth and glossy except a messy bit on top of his head.  Thick fur around his legs and gut almost hid the miniscule gym shorts he had on.  He might as well have been bottomless.  

Myst was thankful that his own tank top hung loose, and wasn’t conforming to the shape of his nipples like the bear’s were.  As he approached, he hoped the bear didn’t notice how much his yellow eyes were thirsting over him.  

“Hi, I have a referral, to sign up here.. and stuff” Myst squeaked, he slid a paper with a referral number on it across the counter.  He was visibly nervous, holding his tail close.  

The Bear quickly typed the number using his sharp claws into his keyboard.  How the normal sized keyboard looked tiny against even his paws.  The bear smirked and looked Myst over  again before he pulled out a clipboard and handed it over.  “That all checks out.  We don’t take new members without a referral but lucky for you.  Fill out this form and I can help you get set up.  With a referral, we offer a tour and if you want, a fitness evaluation.” said with a big grin.

Myst gulped, thanked the bear, and retreated to a corner of the room.  He started filling in the form with the basic information requested, he casually noticed the few furs passing through reception as he worked through the form.  Most of them were bears but there was some diversity, at least another otter went by.   

Still focused on the form, Myst thought he saw the bear checking IDs caressing the butt of a fox on their way into the gym.  He sneaked a look up to confirm and saw the other was looking directly at him.   He glanced at the other bear, back to Myst and winked.  Myst wasn’t sure why but he went back to looking at the form a bit flustered.  Blushing, he quickly filled in the rest of the required section.  The rest of the form was marked optional.  He gave it a quick look through.  He thought he was seeing things because he just read one of the sections marked  ‘sexual experience’.  Giving up on filling out any more of the form,  he got up and returned it.

The bear looked quickly through the form before putting it away.  “Myst, nice to meet you, I’m Gunnar.  You didn’t put much information down, so we should do that evaluation, we can do the tour after?” Gunnar asked.

“That’s fine,” Myst replied sheepishly.

“And you need to sign this.”  He pulled out another document which Myst quickly signed.   

“Now, follow me.” The bear said, as he swung himself over the counter.  Myst got a light bonk from his belly, before the bear grabbed the otter by the wrist and dragged him into the gym.  

Myst was taking 5 steps for each of the bears and could barely keep up.  The only thing he saw was Gunnar’s muscular back.  The bear’s gym shorts looked more like a thong from behind. his muscular butt cheeks hung out heavily on both sides.  The shorts got pushed deeper and deeper.  It was difficult for him to run with a hard on, but he managed.  

—

“This machine runs our evaluation test.  Have you used an exercise bike before?”  Gunnar asked.  

“Like one of those stationary bikes?” Myst nodded, “Ya, I have.”  Myst didn’t get a lot of a look around, Mostly it just looked like a normal gym, but he got the suspicion that something wasn’t right.  In front of them was what looked like an ordinary, but quite fancy exercise bike, connected to an outer frame with some kind of contraption at the back.  

“This is a comprehensive full body workout too.”  The bear stated, lovingly patting the machine as he did.  “Just pedal like you're on one for the duration of the test.  Let's get you set up!”

Myst was directed to sit down on the odd shaped bike seat.  The handle bars were far forward, he had to almost lay flat to reach them.  “Like this?” Myst asked.  

“Ya, almost.  You feel those metal bars like hand breaks, When you feel comfortable squeeze down on both of them.” The bear said.  He was in front of the bike but Myst could only see his lower half from this odd position.  

“Ok” Myst adjusted himself till he felt comfortable, and then squeezed.  There was a metallic click, and he felt something on his wrists.  He flinched, but his arms didn’t move.  He shook his hands, and still nothing.  He had wrist cuffs locking his hands in place.  “Uh, what?”

“Don’t worry about it, it’s all part of the test.  Here let me help with the rest.”  The bear leaned in, his gym shorts filling Myst’s vision.  He couldn’t help but notice the bear's dick head sticking out from the shorts leg hole.  The shorts were already tight, but a whole tube was just pushing outwards in there.  Breathing in he got a mouthful of sweaty bear.  His dick twitched in his shorts.  

There was a click, and another one, as Myst feet were positioned on the pedals by those huge paws.  “Nice and snug.”  Gunnar said, as he checked the foot was secured well to the peddle.   His claws stoked up from his legs, and the paws wrapped around Myst’s panicked and wildly moving tail.  “Don’t want you getting in the way either.”  He said as he wrangled the tail upwards,  until another  click rang out.  The tail barely wibbled with the otter bellow.  

“What the hell is going on?” Myst shouted into the bear's crotch.  The bear’s crotch moved away.  Myst looked around, but from his position, he was looking directly down.  He couldn’t see the bear, Just the wall in front of him, and the floor below.  Myst shook his hands but he couldn’t move his hands or his tail and he could only peddle his feet.  Even his tail was stuck.  

“The evaluation, it’s all automated now.  I will be back when it’s over.  Have fun.”  The bear said.  He caressed the otter's tail, sliding down with a claw to his shorts.  “Your ass looks great like this.  Think about what some extra squats will do.” He carefully pulled the shorts down just a bit, until he saw Myst’s small yellow hole.  “If you need me or anything, just call out the safeword.”

“Wait, what? Come back! Get me out of this!” Myst called out, but didn’t get a reply.  He just heard the bear humming to himself, but even that was getting fainter.  

Myst wondered if the document he signed said something about safewords, but he didn’t read any of it!  With a dejected sigh, he tried to wriggle his way out of the restraints.  It didn’t help. 

—

The pedals glided smoothly and with nothing else working, Myst decided to peddle forward. It was easy and felt good to have some control over something.  He did come here to exercise after all.  What harm could it do?  

As he got up to speed with his peddling, a few things started to happen.  He felt the pedals start to give a bit of resistance, not much but enough to know something had changed.  At the same time, he noticed a strange feeling, like a small vibrator pressed against him.  It felt good, but weird to feel while he was like this.  It was coming from the bike seat.  He was leaning so far forward that his crotch was directly pressed into it, and the seat had enough give that his whole package was being vibrated from all sides.    

Myst stopped peddling, weirded out at what had just happened.  He hopelessly shook his hands in an attempt to readjust himself without success. He couldn't move his crotch from the seat as he was already pulled so far forward from his hands on the handles, and his feet on the petals.  

Myst yelped with surprise.  A cold wet object slid against him.  It poked at the base of his tail, and slid its way down until it was right over his sensitive hole. Slowly Myst felt the tip of whatever it was press against him.   He was stunned, trying to adjust to whatever he was feeling.  

In a panic, Myst started to peddle again, moaning as he did.  The vibration started up again, and the object pulled out and away.  Myst sighed with relief, until he started to feel resistance on the pedals.  It took just a bit more energy to keep pedalling for each moment that passed.    

A small screen below Myst flicked on with a cute animation of a cartoon bear dragging the text on screen “Fitness and Sexual Wellness Check”.  The screen switched to a screen showing a few things.  The first was a graph showing how difficult it was currently to peddle over time.  Right now, the line was near the bottom near a label of ‘low resistance’, but there were a lot of ups and downs ahead.  Below that was some meter called Heat.  It was slowly ticking upwards.  Peddling seemed to cause the meter to reduce slightly.  Right now, he was peddling enough to keep it steady.  Lastly were the words “Until Satisfied” near a label of “Test Duration”.

Between him trying to read the screen to make sense of what was going on, his focus on peddling slipped.  It didn’t help that the pedal resistance was going up.  His pedaling slowed and slowly the Heat gauge wasn’t pushed back fast enough by his peddling, and slowly started to tick up.

He felt it again.  The same slimy object pressed against his butthole.  Slowly it slid its way into him.  While it was similar to experiences he had had before, having some kind of smooth rubbery tube pushed against his sphincter and invading up his ass didn’t feel normal.  Unwilling to admit to himself how much he still enjoyed the feeling despite the situation, he peddled harder.  Visually, he saw the heat gauge go down slightly a bit as he felt the tube slide out a bit.  He couldn’t keep pedalling that hard forever, and with his pace slowing again, the pole smoothly glided in again.  It just relentlessly fed more of the slimy tube into him, with his pathetic pase only causing it to retract in short bursts.  More in and less out; Deeper and deeper; The heat gauge ticking up and up with it.  

Myst tried to muffle a moan.  Despite the intense distractions, he was unfortunately starting to understand what was going on.  The seat of the bike to begin with, he wasn’t really sitting on.  It must not have been shaped like a normal seat because the bulge in his shorts pressed into the back where it curved around and allowed it to vibrate from all sides.  The harder he peddled, the stronger the vibration was.  A distracting yet good feeling reward, although it was tiring to peddle fast enough for a strong vibration.  

If that was some messed up incentive to keep pedalling fast, then the other was some kind of punishment for going too slow.  Myst guessed he had to keep the heat down by pedalling fast enough.  If he was too slow, some lubed up  dildo or something would penetrate him, and while it did feel good, it wasn’t something he wanted now, especially in the middle of the gym.  And… if the toy could get in… Was his ass exposed?  Between the buzzing at his crotch and the now deep toy at his butt, he wasn’t able to think about much.  Just peddling as hard as he could was his focus, and he gave up on holding in his moans.  

The losing battle eventually was lost and the heavily panting and moaning otter had slowed his peddling to a crawl in a moment of exhaustion.  Quickly, the rubber tentacle slithered up inside him about as deep as anything had ever been and kept going.  It just kept sliding deeper, and the peddling just kept getting harder.  He was feeling this thing push in inches and his countering pedaling barely fighting back at all.  It just kept going.  

At least it didn’t feel thick at all. Myst thought he had taken dicks significantly wider, but never, never, that long before.  With such depth, he encountered a new, mostly unpleasant, feeling.  How many inches deep, he couldn’t say.  It felt odd to feel it just inserting more and more, but deep down he was enjoying the discovery and did as he had before felt accomplished by trying something new with his hole.

Whatever his limit was, this machine found it.  Some bump somewhere inside him got a sharp twinge in a weird place deep in his belly.  The machine stopped all toy movement as a small fanfare played.  The screen showed a graphic of a flame, which settled next to the heat gauge. A small blue circle filled the screen with the text “Short rest”

The otter adjusted to the whole feeling inside of him.  Not that it was desirable, but Myst felt like he had a second to recover.  Stopping to peddle, and catch his breath was nice.  He had been so distracted, he didn’t realize how much he was pre cumming.  He was able to move his crotch only slightly, and felt the wet and stickiness of it.   Myst just breathed, and tried to get the most out of the rest he had.  The circle had disappeared fast, and only a small sliver remained.  

The rubbery toy inside him began to start moving in and out on its own just as the rest ended.  It wasn’t much more than an inch but he felt it.  It felt way better than it should have and part of him wanted it to go harder, but he wanted the vibration on his dick again too, which meant he needed to start pedalling again no matter how much effort it took.  The otter yelled out in frustration and started pedalling.  

The pedals resistance thankfully had dropped a bit.  Myst took advantage and pedalled harder.  He felt more in control.  The machine riding him continued going in and out, but his peddling did seem to push its thrusts to a lighter depth.  He was hoping to get it all the way back to his peak enjoyment position, where it would be hitting his prostate directly.  The task seemed impossibly difficult, but he didn’t really care too much.  The machine’s now automatic movements and vibrations again were letting him just enjoy his experience.  

He felt sweaty, tired, and buzzed.  His crotch was non stop against the strong vibrations of the seat.  The pole sliding in him was enjoyable, and he was somewhat confident in controlling it. Myst intentionally slowed slightly.  He was hoping to find some deeper place to ride out the high he was feeling.  His actions unfortunately reduced the crotch vibrations slightly as the toy in his tail hole got deeper and deeper.  He felt in control, until he noticed the pedal resistance coming back. 

Mild panic set in again when his peddling slowed against the difficulty to peddle.  As expected, the pole went all the way past where he wanted it until it was back bottomed out inside him again.  

There was another flame fanfare on the screen.  A second flame joined the first.  Immediately, something felt different.  The thrusts themselves were at the same steady pace, but they started covering more length.  It wasn’t exactly slamming into him, but it was a bit too fast to be the gentle fucking he had gotten used to.  It also might have been thicker.  Especially at the base, something felt different to Myst.  With each thrust new feeling got stronger.  At the fourth thrust, he was certain.  It was getting thicker, and the thickness was creeping up the slimy toy.  The thrusts became far more intense as they thrust inward.  If he had been mastering this thing in snake form, it had decided that he was to be a traffic cone.  And like a cone, the thickness never seemed to stop growing.  

Myst started panic peddling, hoping to avoid the widening section of the pole.  He peddled fast, bypassing his exhaustion again. His pressed dick vibrated intensely.  Moaning again through his panic, he felt able to keep up with the widening for an intense few minutes.  He was so focused that he was startled when he heard voices approaching.  

“Fuck, Did I look this hot when doing this test?”  Said some squeaky sounding voice.  Facing down as he was, Myst’s  position only let him see the paws of an otter approaching along with the huge claws of a bear next to him.  

“Yea, even if you did give up part way through.” The owner of the Bear feet said.  “Not as loud as this one is though.  We have to work on that.”  The bear did something Myst couldn’t see and the otter next to him half squeaked and then moaned.    “That’s my squeak box!” the otter yelled.  The bear laughed.

Myst was still focused on peddling.  He tried to ignore the watching group that gnawed on his dignity.  He just continued peddling, as hard as he could, regardless of how wide the toy felt.  Myst hopped it wasn’t the audience, but something had just hit right because he felt like he was about to cum.  The buzzing of the seat, the now intense toy mashing his hole, it felt so good that it overcame whatever burn he felt from exhaustion.  He really hoped it wasn’t the audience.

“OOOooo!  We arrived just in time!”  The otter said excitedly.  His paws stepped forward, but Myst still couldn’t see much.  

Myst moaned and yelled out with release.  He felt himself cumming into his gym shorts.  The vibrating seat helped him moan and squirt out again and again.  He had instinctively stopped pedalling as he came, but the vibrations didn’t stop, and neither did the butt pounding thrusts.  Instead it seemed both became more intense.  The rubbery tentacle pounded him with full deep long thrusts as he poured more and more otter cream out.  The loud moaning turned to full on yelling, when the seat's vibration still didn’t stop.  He was just getting so over-stimulated, and couldn’t wiggle his way out.  His paws were still locked in place, and now the petals were locked in place too.  He just kept getting the vibrations.  It hurt in a good way, but it hurt.  Myst really hated to admit to himself that he was enjoying even this part of 
being used by this machine.  The screen changed to big bold text with the word “finalizing”.

If he wasn’t so distracted, he might have realized the reason why his back suddenly felt wet.  The otter had come all over Myst’s tank top, closely followed by the bear doing the same.  He had completely missed the first glob, which hit the back of his head accompanied by the grunting sounds of a Grizzly.  

“Did I miss the fun part?” A new voice asked.  

“He just came.”  The bear's voice replied.  “You're fast, 5 bucks if you finish before the test”  He added with a bit of a chuckle.  

“Ha ha, very funny… I’m in”  The new voice replied.  A pair of cheetah paws approached him like the others had. 
  
Myst wanted to figure out what was going on but was too distracted.  The seat was still vibrating as strongly as ever and his ass pounding had gotten more intense.  It continued to get wider and to thrust almost its full length.  Between the two, he didn’t have any thoughts except pain, exhaustion and the need to cum again.  

To his side, the wet sounds of the cheetah sloppily masturbating might have been heard.  The cheetah growled quietly at first, but quickly went silent just as more wet spots splattered onto his back.  

Myst realized he was cumming only when he felt his shorts get even stickier.  His dick felt like it was leaking fire.  His ass was either burning or numb, he couldn’t tell which.  His head was empty.  His voice was horse from all of the yelling.

Thankfully, the vibrations stopped this time and the ass invader retraced.  The screen in front of him played a small animation of fireworks.  “Congratulations” Your evaluation is over” it read.  Please wait for your trainer to see you.  

Myst was exhausted.  He tried to move his hands or legs again, but they still felt just as stuck.  Exhausted, Myst closed his eyes and breathed deeply.  

“How many do you think we can get for the newbie?” The Bear asked.  

“At least half the gym is already here, so… a lot!” The otter responded.  “I’m jealous.”  

“See, my training has a point!”  The bear said over the otter’s squeaks.

Myst felt fully exhausted, and drifted off to sleep.  

—

Myst was having a nice dream about riding a bike.  He was riding behind a naked bear and was watching the bear's sweaty butt sway and shake as he peddled.  The bear was grunting.  He smelled the sweat on the bear, it was sweet and Myst was pedalling faster to catch up. His face got closer, the smell got more intense, the Bears grunting got louder.  He felt sweat pouring down his face.  The sweat smelled of bear cum.  It oozed down his face.  Licking his lips he tasted it.  

Myst opened his eyes to a sweaty pair of Bear balls.  The salty taste on his lips was still there.  He swirled the cum around in his mouth and swallowed with a satisfied “Aahh”

“Hey there sleepy head.” He heard Gunnar’s voice say.  “How ya feeling?”  The bear squatted down.  Gunnar’s balls descended as his face came into view, mere inches away.   

“My… Everything hurts.” Myst responded groggily, still waking up.  

“Well, good.  We want to test your limits”  He felt the bear caress his chin.  “Now, you're gonna be a good boy and rehydrate?”

“Ya, very thirsty.”  Mumbled Myst.  He yawned, and tried to ignore the soreness that throbbed from his ass.  

Gunnar smiled, “Good boy.” Gunnar stood back up, his hard sweaty dick came back into view, and slid forward into Myst’s shocked mouth.  A gush of warm, very diluted almost pure water piss flooded down Myst’s throat.

Shocked back to alertness, Myst realized that he was still locked and couldn’t move. He was unable to do anything except swallow the bear's piss flooding into his mouth.  He breathed through his nose when he could, but his tired body wanted the hydration, and he tried to swallow as much as he could.  The bear's fur was musky and stronger than the ‘water’ he was getting.  

“Perk of having me be your trainer.  I keep myself so hydrated, that I can hidrate my trainees too,” Gunner said casually.  “Anyway, your evaluation is complete and  you didn’t do badly”  Your hole could use some stretching still, and you are in decent shape, At least when motivated.  You got a good ass on you but i think we can get you as plump as any good cumdump should be.  Any goals you want to work towards?” Gunnar asked, stopping his piss stream and moving his cock out. 

Myst spluttered, and breathed heavy, catching his breath after all that drinking.  “I just wanted to exercise more.  Maybe go swimming.”  Myst said when he finally felt able to.  “What was that about a cumdu…”  Myst was interrupted by Gunnar shoving his dick back in Myst.

Gunnar’s dickhead was deep enough to fill Myst’s mouth, but not too deep so the tip rested on his tongue. Myst licked the head and forgot what he was going to say as it started peeing again.  “Both should be easily doable.  You seem to be welcomed by our community so even outside of our training you won't have trouble finding a gym partner.”  His piss stream came to an end.  He shot a few last spurts into Myst’s mouth which Myst greedily sucked down, and immediately started  thrusting his dick into the otters throat.  “We have a nice pool and we will see it on the rest of your tour,  Which… We… Will… Get…To…After…” Gunnar aggressively thrust into Myst’s face, ending balls deep as he grunted, cumming directly down Myst’s throat.  “Your protein shake. Heh.” 

–

Myst wiggled happily in the arms of Gunnar.  He was happy to be out of the machine at last.  When the bear unlocked him, he took about 3 steps before Gunnar had to catch him.  His back and head were covered in dried cum of all sorts. Apparently 15  different gym members had cum tagged him.  It was some kind of unofficial welcoming tradition.   

The rest of him wasn’t much cleaner.  His crotch was crusty just with his own cum.  He could feel the shorts stuck to his sheath and ball fur, and was not looking forward to peeling them off.  

Myst had attempted to pull the back of his shorts up to his tail, but Gunnar had pulled them back down.  A saliva covered paw pad of Gunnar’s was massaging his sore hole.  If being lightly fingered was the price of being carried, Myst didn’t mind.  His hole still felt raw and stretched, but the paw on it was soothing.  He was just glad being horny at the gym wasn’t going to be an issue here.