Chapter Text
Jason had a Dr.Dixon, a vet, come over and inspect his pet. Dr Dixon looked them over with clothes on, then with clothes off. Once Dr.Dixon sees that Jason's pup is in good health on the outside, he has to check their insides, Jason putting a muzzle on his pup just in case they decide to get aggressive. He then lays the pup on their back, cuffing their spread out arms and legs to the bed frame. The Dr.Dixon then goes through his bag and pulls out plugs, hoses, funnels, and lube. He takes the bigger hose and lubes one end up, gently pressing it against the pups rear. The pup struggles a bit, letting out whimpers, but he just hushes the pup with a smile. He pushes it in, getting the tube a few inches in before inflating a small baloon to prevent it from slipping out. He then takes a thinner tube and lubes up one end, pressing it against the pups piss slit afterwards. The pup struggles more, shaking their head. Dr.Dixon just hushes them again, pushing it in with ease thanks to the lube. Pups eyes water as the intrusive thing wriggles itself into their urethra, soon pressing against a slightly painful barrier. Dr.Dixon tells the pup to relax and try to pee. The Pup struggles, but does what they're asked. Soon after, the tube is pushed into something inside that's never been touched, making pup feel wierd. Jason coos happily, giving his pup a pat on the head for being so good. "Good pup. It's all the way in your bladder now.." The end of the tube is clamped shut, so nothing comes out. Dr.Dixon then inflates the small balloon within the pups bladder, so the catheter won't accidentally slip out. Next, a thin based funnel is attached to the portruding part of the catheter, and a large 3L bag full of saline is attached to the larger tube within the pup's rear. Dr.Dixon looked at the pup with a smile "You all ready to get cleaned from the inside pup?" He asked. The pup shook their head, struggling again once they felt the flow of cool saline enter their back hole. The catheter was being held up by the pups master, a sadistic grin plastered onto his face. Dr.Dixon comes over and looks at the pup, almost the same smile plastered onto his face. Dr.Dixon unzips his pants, while master unbuckles his belt. The funnel is slim at the bottom, so it can attach to the small hole of the catheter, while the top is around average width and depth. Both master and vet had their members hanging from their pants, both flaccid for the moment. They both put their members over the funnel, and start to piss. The golden liquid sloshing around the funnel, before quickly rushing through the catheter, entering and painfully filling the pups bladder. Pups eyes watered as they wiggled around, unable to move much due to their bound arms and legs. The pup couldn't talk, or even scream, as they were gagged and muzzled. The piss soon began to fill the pups poor overstuffed bladder, the sac just starting to form a bulge in pups abdomen. Their Master and Dr.Dixon both finish within 30 seconds or less, their cocks now hard as rocks. They start jerking off to the sight. (A muzzled Mutt laying on it's back, tied up and chained to a bed while both it's holes are stuffed with tubes. It's belly now bulging a bit due to the saline it received from the large 3L enema, and it's bladder, a piss filled bulge in it's abdomen, now full of it's masters, and vets piss. Soon, their jizz would be added to this poor pups swollen bladder.)Their master and vet are close, now grunting and groaning as they both stare at the Mutt. Soon, they both cum, the thick spiderweb globs of white cum dripping into the funnel. The master lets out a few more spurts of piss into the funnel, washing the jizz down with it. All of it now safely packed into the pups now swollen bladder. It's master and Dr.Dixon both zip and buckle their pants back up, their master now gently rubbing the Mutt's bladder bulge as the vet clamped the catheter shut once again, removing the larger tube from the pups rear, and quickly replacing it with it's tail plug. The pup lets out a soft whimpery moan as this is done, it's bladder and stomach cramping from all the liquid now stored inside it. The master glanced up at the pup, their cock twitching excitedly as they whimpered. The master smirked, reaching up to it "Oh pup.. I thought you hated medical exams? And here you are, leaking onto the bed.. such a naughty puppy. Does having your bladder full of our piss and cum turn you on? Your precious cock is rock hard.." Their master lowered his hand, now gently squeezing the Mutt's balls. "Heh.. and your balls are just begging for release, aren't they? How long has it been since you last had cummies? Mm.. a month maybe? No.. six months, that's right. Your balls must be stuffed to the brim pup..!" He let out a soft chuckle, rotating each of the Mutt's orbs in between his fingers. "Your balls have grown.. I'm impressed pup. They were much smaller the last time we checked, no?" He looked up at his puppy, the pup nodding shyly. "Heh.. good pup. I'm glad they've gotten bigger, as now they won't shrink down to such a small size. Next time we'll get you a pill or something so it works faster. But for now, I think it's time we emptied those overstuffed balls of yours" He suddenly grabbed hold of the Mutt's cock, rubbing up and down quickly. His mutt moaned and writhed through their gag and restraints, soon Cumming after only a minute or so. But their master didn't stop there, he kept going. Orgasm after orgasm, until the poor Mutt was shooting blanks. He then let the pups rear, and strained bladder drain out into large bags and containers, letting his pup cool down for a while. The pups cock of course was still very much erect and swollen with need, their balls not even close to being empty. He and Dr.Dixon cleaned everything up and untied the Mutt, sitting them up before taking off the muzzle and gag. "How was it?" Asked Dr.Dixon. The pup mumbled something only the other two could hear, resulting in lewd grins. He took the tube and catheter out, both holes now gaping for a few seconds before closing up. The pup hugged up to Alex(Dr.Dixon) before sitting on his lap, now facing their owner. The pup whispered something into their Masters ear before sitting back down onto Alex's lap. They turned away shyly, their cheekbones going red with embarrassment. The master gave a small nod before leaving the room, soon coming back with a backpack. He pulled out a case, along with a puppy hood, and large set of plugs. "Are you sure you don't want to recover first? Aftercare is important Jamison." Said the Alex. The pup nodded, their cock dribbling fluid as it twitched excitedly. "Turn around" said their master. The mutt obediently turned around as asked, their face resting just infront of Alex's very visible bulge within his pants. Lube was gently pushed into the pups back hole, a medium sized plug now slowly being inserted into their rear. The pup moaned, Alex gently petting their head. "Alright, turn around now, show me your front hole Mutt." The pup once again turned around, sitting up straight with their hands being held back by Alex. "Make sure you call out the safeword if it's too much pup.." said Alex. Jamison nodded, as a tube of lube was pressed up against their slit, a few squirts of it sliding up their urethra. The pup let out a soft whimper, soon a long 2cm thick steel ribbed plug was pressed against the tip. The master pushed it in with only a little resistance, the end resting just past their prostate. With a lewd moan the pup looked down. The plug was to ensure his pup didn't piss, or cum without permission. Though they liked it, as it always kept them just on the verge of orgasm. Their master held onto the loop, located at the tip of the pets cock, a large blue jewel portruding from the urethra. Their master gave their balls a gentle squeeze "Mutt, your balls are nowhere near empty you know. We need to fix that, before tomorrow. As you'll be going another six months without cummies after that" He gently pressed a finger on the jewel, pushing it a bit farther in before pulling it out an inch. The Mutt's cock bobbed in excitement, ready to release it's load as soon as the plug was removed. Their master moved his hands away, giving Alex a look. "Colour, both of you." His Mutt said green, as Alex said yellow "I'd like to get myself off on the side this time, if you don't mind. But I'll still watch" Alex smiled, and Master nodded, waving a hand. His pup got off Alex, and sat again. Their master took his hand and placed a finger under the Mutt's chin, making them look him in the eye "Pup, I'd like to fuck your back hole, without removing your piss plug. Is that alright?" The pup nodded, now laying on their back to expose themself. Their master swiftly took out the tail plug, lubing up his cock before gently sliding it in "All these plugs and you're still tight as ever, Mutt." His Pup moaned, their cock bobbing and smearing fluid onto their stomach. Their owner soon began thrusting rapidly, forcing lewd moans out of the Mutt. Alex stood off to the side and watched, his hand being used to jerk his solid member. The pup's owner continued to fuck them, the Mutt's unreleased jizz building up in their urethra, as the plug prevented any from escaping. Jamison was in absolute bliss, their master slowly and agonizingly removed the plug from their urethra, their unspent jizz splattering onto the their face, chest, and stomach. But their master kept going, making his puppy cum over and over again until their balls were empty and they were shooting blanks again. Their master finally came for the fourth time into his Mutt's ass, pulling his cock out before quickly replacing it with a plug "We wouldn't want to waste my precious cum, now would we puppy?" He smirked, scooping Jamison up into his arms. Alex soon joined them, his jizz landing somewhere on the floor. He'd clean that up after. Their master once again rolled the now somewhat deflated puppy orbs in between his fingers, smiling happily "Such a good dog. Such a good puppy for your owners, hm?" He gently squeezed them, putting pressure on to them both until their pup let out a whimper, indicating it started to hurt. "All your puppy milk is now gone. Good thing too, or else they'd be the size of grapefruits next time you got a checkup." His puppy nodded, soon nuzzling into their master's chest. "Well.. I suppose it's time to replace the plug, hm pup? No more cummies for another six months I'm afraid. But.." they pulled out a catheter "I would like to catheterize you, and use your bladder as a urinal in the meantime.." He stared at his puppy, putting down the catheter. "I.. Never mind, it was-" Jamison took the catheter, opening their eyes with a small smile "I'd love to try it Jason. I.. want my bladder to be used as a urinal. I.. want ya to train it, at least three times a week. In public or not.." Their face covered in a thick blush. "Please..? I-I'll keep my plug in for now Master, but.. could we start tomorrow..? There's.. somewhere I wanna take ya an' Alex anyways.. y..you could both use me then.." their cocks all swelled again, including Jamison's. "Pup.. Jamison, I'd love to." Said Jason. Alex nodded, giving Jamison a pat on the head. "But for now, let's get you a different plug, one without a tail so you can get cleaned up and dressed again." Alex smiled, slipping off the bed "I call first dibs in the shower Alex!" Jason yelled. Alex had already run off and hopped into the shower "Guess we're having a bath together Jamison." They both smiled, Jason carrying Jamison to the tub. Jason ran hot water with bubbles, and added a rubber duckie for his own amusement. They sat in the tub, both washing themselves as Jason every now and then would tease Jamison's member. Soon, it became erect and swollen again, making Jamison whimper softly, as they could not longer cum until six months had passed. They soon got out from the tub, Jamison's plugs still in their rightful places. Starting tomorrow, Jamison would 'train' to become Alex and Jason's urinal.