Mark's Training

Story by Kusaragi on SoFurry

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This is a story I decided to write for myself, it was inspired by TheRoop ( http://www.furaffinity.net/user/theroop ) and thinking of Long Blue Claw ( http://www.furaffinity.net/user/longblueclaw )

It's a bit extreme, but it's a good example of my best work. Just about all the work I'll be uploading will be like this.


Written By: Kusaragi January 4, 2012

Disclaimer: This is an adult story intended for people 18 years and older. It contains scenes of graphic sexual content, including oral sex, urethra sounding, tail sex, extreme stretching, cock fisting, bladder penetration, deep penetration, Domination by a smaller Male, Messy sex, slight Hyper content, and orgasm control. If you have stumbled upon this story and you are sane you should probably delete this file and forget you ever saw it. Otherwise enjoy my insanity and kinky imagination.

Disclaimer (2): All characters are Copyright to me and any similarities to actual people or events are... who am I kidding? There's no way this could actually happen.

Disclaimer (Final one I SWEAR!): When attempting urethra sounding, always use something within your abilities, don't take it too fast or too big. Use lots of sterile lube and sterilize all toys before and after use.

And now, to the real smut. Happy fapping.

Tonight was the night. Jeremy had everything set up, and soon Mark would arrive. He went through his check list,

'Lube? Check. Gloves? Check. Condoms? Check... although I probably wont need those.' He thought as he smirked.

The bell rang and the 4 foot nothing mouse bounded across the living room to open the door. Standing before him was a 6 foot 5 behemoth. He was 250 lbs of pure muscle and black fur. His brown spots outlining his eyes and paws. Mark smiled down at his best friend stepping in as he pat the rodent on his head. "Good evening. Do you need help moving your couch again?"

Jeremy brushed Mark's paw off giving the tall Doberman a hug, nuzzling his face against the thick bulge of his sheath. "I missed you, and nope it's not to move furniture. Today is my birthday, and you're going to be my birthday present." The diminutive Mouse turned around, brushing his tail against Mark's hanging balls and rump.

The doberman shivered, trying to resist his libido as he watched the white mouse sway back towards the living room. "What the heck are you talking about? How am I going to be your present. I'm not gift wrapped or anything." He tried to play it off, laughing as he sat on the couch. Before he could even settle in fully Jeremy was between his legs, unzipping his jeans and burying his muzzle into the musky depths of his crotch. Licking insistently at the black rim of his sheath.

Mark tensed as he felt the tiny tongue slip into his sheath and teased his swelling cock. There was no way to hide it now, a jet of pre escaped his shaft and landed right on the mouse's muzzle making the smaller male pull back and make a sour face before licking the drop off and swallowing it down. "Unnnggg. Jeremey wait." The dog said, "There's no way you can take me, I'm like three times your size. What do you have planned?"

Jeremy simply leant back down and slurped over the head of the canine shaft, lapping his tongue across the thin urethra again and again. Popping off the head out of his mouth he licked his lips again. "I wasn't planning on taking you in me at all, I have a surprise for you and there's no way you can stop it." The mouseboi said his eyes glaring down at the canine that dwarfed him.

The dog meanwhile was speechless, he was so used to being the one in control that he had no idea what to do. He sat there mouth agape as his cock was sucked, and with Jeremy's threat he gulped visibly, his cock flexing at the smaller male's words. Without him thinking about it Mark placed his hand on the back of Jeremy's head, gently pressing him closer and closer to his shaft as it jets pre over and over.

Once again the oddly dominate mouse brushed Mark's hand away. He continued to gently lap at the very tip of the pointed dog cock pressing insistently at his urethra, which finally gave up resisting and allowed the rodent's tongue to slip inside the dobermans most private place. Mark had played with his urethra before, teasing it with some small toys, but this was a living person pleasing him so, and he was unable to stifle the heated moan as his cumslit was speared by Jeremy's talented tongue.

Now that he had access to Mark's urethra the sly mouse started nibbling on the tip of his shaft, causing the slab of meat to flex and produce more precum as the dog's hips thrust on their own. Each flex Jeremy plunged deeper till he was french kissing Mark's cock. Every inch of his tongue squeezed into a hole usually too tight for such an entry. When he pulled back the slit stayed gaping for a moment before another flex of mark's hips closed it, and a huge glob of precum oozed from it.

Mark was totally enraptured by the feeling, his upper body limp across the couch as his hips bucked and twitched. He didn't even pay attention to Jeremy as he reached for something under the couch. It was a large metal jar, that came nearly to the mouse boy's knees. He unscrewed the top and then quickly dipped his hairless tail in the thick goop, spinning it around and coating the entire appendage in a thick layer of the stuff.

Mark's shaft was at half mast, the impressive blowjob already had his knot bulging the furry sleeve and 7 inches of his shaft standing proudly in the air, twitching and swelling in time with his heart beat. Jeremy took hold of the sheath, pulled and tugged it down till it slipped past the knot, and let it rest comfortably behind it letting the cock swing free and lowered it towards the bottom of the couch.

Without any warning, the kinky mouse slipped his tail up to, then into the dog's urethra. The thick lube making the entry effortless as nearly a foot of rodent tail speared into Mark's shaft, and beyond. He could feel the very tip of the tail brushing against a muscle deep within him and it sent a sick, WRONG shiver down his body. But all his concerns about his situation melted away as Jeremy started twirling and twitching his tail inside his cock. His knot grew and grew, precum launched from around Jeremy's tail pressurized by the limited space and he nearly came from having his cock violated so. But the mouse was paying close attention. Just as Mark was about to go over the edge, he pulled his entire tail out of the doberman's engorged shaft.

Despirate to cum Mark brought his hands down to his member only to be swatted away "NO! Bad dog." Jeremy scolded, smiling as Mark's ears lay flat against his head in submission. He brought his hands to Mark's member, both of them covered up to his elbow in blue latex gloves, one of them rested on his fully formed knot, pulling and teasing it slightly, watching as more precum and lube dribbled from his stretched cumslit. the other was coated in a thick layer of the clear lubricant. and he brought his trembling fingers to Mark's urethra. 'I can't believe this is actually working' he thought. Amazed at the level of control he had achieved over the much larger male. Getting a little drunk on his power he started to finger the canine shaft in front of him, pulling open the tight ring with two fingers, plunging them in to the last knuckle before stretching him out as he pulled is fingers apart.

Mark Whined, the constant teasing was driving him mad, his hips thrust, trying to push himself over the edge by stimulating his knot, and only succeeded in looking like a slut trying to get the mouse's fingers deeper. Jeremy was a complete mess, He was covered in lube and pre-ejaculate his face matted with sweat and his own shaft throbbed with need, ignored as it was, but he was too caught up with showing this pup who was boss. He slipped in a third finger, sawing it in and out with the others and watched rapt as the opening kept right on stretching. Mark's moan was the last straw and he poised his whole hand in a cone and forced his weight down onto his hand.

Mark let out a yelp of discomfort, arching his back and clenching his eyes shut as he tried to come to grips with what just happened, when he looked down and saw his shaft, wrapped cleanly around Jeremy's wrist he came... and came HARD. his knot swelled again as his internal muscles clenched everywhere, sending his cum up his length, only to be stopped at the exit, Jeremy's paw and arm blocking all the cum as he stared.

The mouse was just as amazed, the feeling of his paw so deep in another male was unlike anything he had ever tried before. Testing to see how much he could do, he started to push forward, his paw finding more then enough space to sink into Mark's cock, the cum, lube and glove made his entry smooth and steady. He watched as the bulge of his paw moved further and further down the underside of the red, angry shaft. He only stopped when the outline of his fingers met with the bulb of Mark's knot.

The passage deeper was much tighter, the knot pulsing in a drawn out climax as the dog's muscles became confused. it was so pleasurable but the more he came the more pressure there was. Jeremy would not be denied however. He was determined to see just how far he could go. He gripped Mark's knot firmly, and pulled his other arm deeper, pushing and pulling, wiggling and twisting, his paw started to move deeper. Mark could only gasp as the head of his shaft crept up to Jeremy's elbow and with one last shove, the small mouse paw made it past the thick knot, teasing the nerves that stimulated a tie, just as Mark's shaft slipped past the joint in Jeremy's arm.

Mark's shaft was swollen and engorged, more blood was forced into his sensitive flesh and allowed it to stretch around the insane penetration Jeremy was subjecting him to... but despite that Mark had never felt this good, He looked down at his shaft, easly twice as big as it usually was and instantly came again. With nowhere for the cum to go there was a shudder and gurgle around the mouse's arm, the pressure almost forcing his arm out of the dog's shaft but his hold on the knot kept him right where he was. he even managed to get a little deeper, his elbow slipping smoothly into the hugely stretched hole. That one crook was enough to break the dam, cum burst from around the mouse's arm splattering him in the chest, face, and groin.

The dog fell back, eyes closed and tongue hanging out of his mouth as he tried to calm down from one of the best cums of his life. His stomach ached, his balls were still twitching and his knot was still swollen, his body throughly convinced he was buried knot deep in a bitch, still producing and trying to expel seed. Jeremy smiled as Mark's cock relaxed, the pulse of his heartbeat around his arm very comforting, he only enjoyed it for a moment before starting to slip deeper into Mark's body. His fingers outstretched, looking for something deeper, something tighter.

He found the dog's bladder. the tight ring of muscle a virgin to any form of penetration. and he was knocking on the door. twisting and pushing deeper, shoving his forearm into Mark's urethra as his fingers tried to pry open his sphincter. Jeremy started to be rougher, and rougher, pulling his arm out till his elbow popped free of the fleshy tube before bearing down and plunging in again. His fingers just barely reaching the tight ring, but each time he did it he got deeper, faster, more insistent. He was making progress.

Mark could only drool at the feeling, he started tweaking his nipples wanting something to do. He was never very sensitive there but the feelings between his legs made everything feel better. He was so close to another climax, so close to feeling like he was part of everything that he didn't even try to hold back. The paw deep inside his body was enough for him, and as the mouse sank in again Mark completely relaxed and let him do anything to him.

The gripping tunnel of the dog cock suddenly released all it's resistance just as the mouseboi was going to shove back in, the lack of resistance sent his whole body downward, his cone shaped paw slipping further down then ever before and his momentum carried him cleanly into Mark's bladder. the ring of muscle wrapping around his wrist and then part of his arm as his now closed fist slammed into the back of the chamber. Mark's belly bulged with the shape of his "rapist's" paw. The sight and feel of being so deeply penetrated was enough for him to cum again. All the muscles that were just relaxed clamped down HARD on the mouse's arm, keeping him locked inside the bladder, and forearm deep in his friend's cock.

Pressing hard against the dog's groin Jeremy pulled his arm out, his hand popping out of his bladder, stopping only when his fist was teasing the inside of Mark's knot again. He waited a moment before gripping the thick bulb and thrust back into Mark's body, his passage yielding with a series of slick, sloppy, liquid sqhishes as he forces his paw back into Mark's body. just as dee as he was beofre. He continued to deeply fist his friend. Causing his body to twitch and buck in his prolonged climax. After a few minuites Mark's shaft gave up all resistence again. His lower body gone limp from overstimulation. His tongue hung out of his mouth, drool dripping from his open maw and onto the couch below as his cockhole was reamed.

As it began to get easier cockfisting his new toy, Jeremy began to have even more wicked ideas form in his head, and seeing Mark's blissful expression he thought 'Why not?' As he sunk deep into his body he went slowly, slipping around inside Mark's belly, looking for a separate small hole, his fist twisting this way and that, fingers pressing against every wall, every nook till they fond the tiny entrance and started pushing into it. slipping one slick finger into it as Mark moaned openly. He didn't know what the mouse was doing, but he didn't want it to stop now. His hips bucked as a second finger joined the first in the tight passage. sinking them up to the palm.

Removing his paw from Mark's knot Jeremy started kneading and stroking his toy's heavy balls, They were swollen with backed up seed, the constant stimulation to his entire shaft and the sliding motion over and THROUGH his prostate made it super productive, and with his cock plugged full there was nowhere for the seed to go. The hefty balls gurgled and sloshed as jeremy added his forth finger to the tight hole, pushing deeper and harder as he felt his paw moving inch by inch deeper. This time there was no ring of flesh to pass beyond. The thin tube was designed only to carry fluids, but the mouse would not be denied, with every shove he found his way deeper, his hand cramping from the tight space, twisting, turning and forcing his way deeper until suddenly, his whole paw entered a hot, wide space. His paw was instantly swimming in fluids, the liquid splashing against his paw as he pushed deeper still, his bicep now stretching Mark's shaft beyond belief. With a final shove that nearly knocked the couch over, Jeremy sunk his whole arm, up to the armpit, inside Mark's cock, his fingers hitting something soft and hot. And as he stroked over Mark's balls he was happy to feel his fingers through the sagging flesh.

Being very gentle after the rough penetration, the mouseboy cupped the sensitive balls from inside and out, caressing them, teasing them softly as Mark writhed on the couch. He kept up the slow rubbing, feeling Mark's shaft twitch and flex in time with his ministrations. Bringing him closer to one of the countless orgasms of the night. But this one was shaping up to be the biggest one yet. He could feel Mark's whole system, from the muscles around his bicep that were clenching in waves, the pressure of his knot as he neared climax again, the swelling of his prostate, down to the once tight muscles of his seminal vesicles. When Mark came his whole body went rigid. his balls pulling up and away from Jeremy's clean paw. Instead of fighting and pushing against the flow, Jeremy let the contractions force his paw out of Mark's thick shaft, pulling inch by inch out as Mark Howled and whimpered in orgasmic bliss.

As Jeremy's arm finally popped out of the dog cock he had been ravaging for hours the hole stayed gaping and loose, the cum that backed up was released all at once, spraying wildly in every direction splattering Jeremy further and making a mess of the coffee table and TV clear across the room. The mouse opened his mouth wide, catching cum as it washed over him and gulping it down by the cup. He stroked his small (by comparison) cock, moaning as he came powerfully, suddenly, adding his own contribution to the mess. When they finally came down from their climaxes Jeremy stroked over his body, working the cum into his fur, churring lightly as Mark Gulped down air, his body totally exhausted from the session.

Noting that something was missing Jeremy looked down at his paw, and saw only matted fur and cum. His glove had gone missing somewhere along the line and he'd not even noticed. Shrugging he brought his paw back to Mark's shaft and PLUNGED all the way back down, and into his bladder, looking around carefully for his missing glove.Finding no trace of it he smiles as he pulls back to the now ruined entrance to Mark's balls and pushes on through. He strokes over mark's ball again gently just to tease him in his afterglow, and was rewarded with a moaning shudder. Pushing as deep as he could he felt the plastic glove resting at the bottom of the sack, and plucked it before pulling back slowly. When he finally gets his hand out again he smiles at seeing Mark's shaft slowly twitching and firming up again.

"Looks like someone is enjoying their day" He teased. "I take it you'll want to do this again?" The mouse asked coyly. The only response Mark could muster was a moan as he dipped 3 of his fingers in his gaping cumslit as he bucked his hips.