FSE

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First, there came the sounding kit. An unassuming leather satchel that when unzipped revealed a graduated assortment of sleek silver wands. From a selection of ten bound within plush velvet confines, Randy was all too familiar with these rods and what they could do to him whenever the rat ever so casually plucked the case from his repertoire of toys and tools. Yet even when he knew exactly what to expect and what he would feel, it was impossible for him not to weakly whimper and mewl through the gag as Jack had taken each one by one and mercilessly slid them into his cock. But while his maw was gagged, he had not been blindfolded, meaning he was free to stare with wide, desperate eyes as the rat methodically lubed up sound after sound through their increasing size.

Being strapped to the rodent's bondage chair certainly didn't help either, as all the bear could do was voice his displeasure to a sadistic audience as he strained at the binding leather and wood. The ever-present mass deep in his guts also made things more difficult, especially when he was sat immobilized on the base of the plug occupying his hole. Perspiration seeped out of every exposed inch of his naked body as with legs forcibly split apart his erection was violated. Yet despite the cold sweat beading all over him, he felt as though he was burning up, right down to his feverish panting that wheezed around his gag.

The most Randy could do was helplessly watch as the rodent now worked the tenth metal wand from the set into his painfully hard erection. Clear lube and foamy pre slid from the tip of his cock as cold steel slid through his innermost anatomy inch by agonizing inch. Though this was nowhere close to the largest thing Jack had forced into that particular orifice, it by no means made the process any easier regardless of how many times he had taken it before. But it was like his body remembered the sensation all the same, albeit it begrudgingly gave way to the solid rod as the rat's paw delicately pressed it further in. Randy could feel it far deeper inside, the simple sight of the glistening end exposed like the proverbial iceberg, hiding so much more nestled within his urethra and beyond. Weakly he strained again at the chair's straps, his cock reflexively throbbing despite the invading alien metal skewered through it, unable to do anything else with the rat's finger pressed ever so gently against the wand's tip.

“I know you're excited," Jack said with an almost bland indifference, just as every second the rod was buried inside of him dragged on one another the other. His body ached for relief in every possible sense he could think of, all of which the rat translated into 'excitement' as he was racked with trembling desperation. “I've got something particular in mind for tonight, and we're not there just yet."

The rodent's paw let go of the metal wand carefully and, after a moment's pause to ensure it wasn't about to move either way, moved instead to wrap around the bear's swollen manhood. With the underside of his shaft impaled by steel right down to somewhere deep in his groin, Randy's mania doubled as now Jack torturously stroked his slick paw along his sensitive cock. But no matter how hard he grunted and huffed around the gag or how much his body jerked in its restraints, he was unable to stop the dancing, feather-like touch of Jack's paw taunting his flesh.

“Now I know how much you love getting your holes stretched," Randy's eyes darted from the rat's massaging paw to his unyielding stare, unable to decide which was worse to endure. It wasn't entirely true, however, it was Jack who loved to wear the bear down and force him open to terrifying extremes. Randy just wanted to make Jack happy, and if that was the price, then he would resolve himself to pay it.

His cock throbbed in agreement, jutting steel keeping it outstretched in the rodent's palm.

“And you remember the last time Bryce came over." The bear's manhood throbbed again. Harder, this time, merely at the horse's name. The memory of him hit him like a train. “And I'm sure you also remember what he said."

Randy fought back his instinct to tremble within his bindings, frozen stock still as he lost interest in tracking Jack's paw stroking his dick and instead locked eyes with his lover. He did indeed remember what the stallion had said. Or rather, what he had asked.

“He was impressed at how you can take whatever I shove into your cock."

The bear couldn't help but let slip a panicked groan, his jaw tight and ice trickling down his spine as he tried to not let the words sink in.

“He was even more impressed when I fucked your cock…" Jack's fingers slid to the bear's swollen head, swirling and slipping around the protruding tip of steel. Like a silver iceberg, it hid the hard, unfeeling length below that paled in comparison to the sensation of hot, warm meat. Another man's flesh invading your own, fucking a hole that should never be fucked, breeding something that should never be bred…

“And he was so jealous…" The rodent teased and toyed with the sound's tip, prying it back and forth ever so slightly to keep Randy fidgeting on the edge. “Since it looked and felt so good…"

Randy whimpered again, the sound more defeated than last time. While Jack's gaze was still firm and unrelenting, his lips had begun to curl almost imperceptibly. He savored the bear's distress, and he taunted him along even further,

“So I figured," Jack pulled on the rod, harder this time and no longer stopping to ease it back in. “Since he's such a good friend of ours." Randy grunted, muscles wrought in their constraints as the rushing, sickening sensation of his genitals being emptied tumbled through him. “And since you'll like it anyway…" The sound slopped free with a gross pop of air and lube, and without the metal to hold it aloft, the bear's cored-out cock hung in a limp arch. “I figured you wouldn't mind letting him have a go." Randy could feel how stretched he now was, his urethra still agape despite the rod's absence. “So… what do you think?"

The bear panted with ragged breaths. He wanted to protest, though he knew he would never have said no, but the remaining rationale in the back of his mind begged him to do something. All he could manage, however, was a long, drawled, pitiful moan.

Jack's smirk turned into a smile. His eyes shone with perverse glee.

“Of course, silly me," Jack rose to his feet, discarding the last sound and wiping his soiled paw across the bear's fur, “I knew your answer would already be yes."

Falling slack back into the chair, his sweat-sodden body melting into the warm wood beneath, Randy took what few precious seconds he could as the rat moved away. While he was no longer contending with the discomfort of metal occupying his innermost anatomy, he couldn't help but mull over the ordeal laid before him by Jack. His chest heaved with every steady heartbeat as he did his best not to hyperventilate the more he thought about it. He tried to blot out the mental picture forming in his head of Bryce hunkered over him, their cocks lined tip to tip, only for the horse to start to press forward. His eyes squeezed shut and his ass clenched around the plug in his hole, desperate to block the sight of his poor cock stretched apart and ruined by the stallion's manhood forced into it.

“This'll do" Jack announced aloud, his fall of his footpaws returning to where the bear remained trapped. “It's about halfway, I think."

Turning over his paws was a dildo of average and non-descript design, one of the softer toys made from clouding, translucent silicone. It was larger than the rat's own cock, but not quite as big as what he might have expected for a horse like Bryce. Instead, Randy realized, it was just about in between, a surrogate midway point in length and width for the bear to start with. His gaze followed it in the man's paws, knowing that this would be possibly one of the largest things Jack had made him take, at least for down there…

He stayed as impassive as he could while the rodent fetched his trusted bottle of lube, wasting no time lathering the toy up within his paw until it was pasted in a wet sheen. Randy already knew what was coming, they'd been here before, but still the anticipation of what was next had him nervously writhing in place.

"Let's get to work then."

Jack settled back into position between the bear's spread legs, one paw already lifting Randy's sagging, throbbing length up to meet the poised dildo in his other fist. He took deep albeit sharp breaths, biting into the gag, as the heads of both gently met and then… Jack started to push. The rat's arm shook slightly from the initial strength required, and Randy felt his extremities going numb as everything seized within him. His cock seemed reluctant to break, where it would stretch no further as the dildo's tip pressed against his urethra, but there was nothing that would stop the rat when he was in the moment. With his brow furrowed and pressure consistent, he waited each second out until, finally, something gave.

Snarling behind the gag, Randy felt himself jolt from the sudden intrusion. He wheezed and winced as the sensation of his stretched cock bristled through him. He barely mustered the strength to crane his neck and look down, greeted by the sight of Jack leisurely feeding the long dildo into him. Between the straining flesh of his cock engulfing the toy to the smooth, pliant rubber gliding within him, Randy breathed as deep as he could through his nose, drool hanging from his lips, left only to watch and wait.

Inch by inch, Jack guided the toy down the canal of the bear's cock, maneuvering and easing its passage to reshape his anatomy into a singular, hollow tunnel. Unlike the metal sound, while the dildo should have been more lax within him, Randy could hardly feel the difference as the comparatively larger toy dwarfed the rod before it. There was a deep, sinking feeling as the dildo's tip descended through his cock and further into his abdomen, leaving the bear with the disquieting sense of mass sitting against his bladder. But before it dared try and break yet another hole of the bear's, the toy stopped. Randy had been spared, if only when he felt the toy's molded balls resting against his bloated head.

He didn't want to believe it was possible, but neither his eyes nor his body were lying to him. Randy stared blankly down at his distended cock that now enveloped an even larger dildo than he'd ever thought he could take. Everything within him felt like squeezing, his hole wringing itself against the plug, limbs working against the chair, teeth snagging on his gag, and all of it fruitless in doing anything to expel the swaying mass of silicone hanging from his dick.

“Shit," Jack said, fighting back half a laugh of his own disbelief tinged with undeserving pride. “That was disgustingly easy…"

While Randy struggled to know just what he should be feeling about his “accomplishment," it seemed the rat was more than pleased with his work so far.

“Well done, boy. Well fucking done."

The praise, if nothing else, was very much welcome, and Randy let it drip over him in a warm wave. It wouldn't quell the alien sensations still coursing through him, radiating out from his crotch to every inch of his body, but it was at least a balm to be convinced that it was something good.

“Hold onto that for me," Jack said as he picked himself back up. Randy's cock swung with a pulse of his heartbeat, bobbing the dildo with it in a gentle arc in the air. He didn't want the rat to just leave him there, not with the toy still inside him, but as usual the bear didn't have a choice in the matter. Again, he could only watch as his master walked away, back to the bound bear, and turned to his assortment of trinkets and toys. He stewed in the encroaching discomfort that began to ebb its way through his cock, both his body and mind unaccustomed to being so full for so long, especially within his own genitals. Sounds and buttplugs were par for the course, but using dildos in ways they weren't meant to was becoming much more common for the rat, and Randy was far off from acclimatizing to the new norm. He shifted and shuffled to shake the sensation, but it refused to relent, as if the feeling was coming from his cock surrendering to its newest, overstretched size.

Randy whined, sucking air into his lungs as he felt fresh sweat beading down his back. This was wrong, but still he did nothing. He just pushed the idea of using his gesture for Jack to stop it all to the back of his mind and endured.

When he regained some semblance of his composure, the rat was already back before him, though his attention wasn't on the waiting bear. Instead, he concentrated on the new toy held within his paws, one that he was already in the process of generously lubing up. But as Randy focused on the toy himself, he felt his gut drop from within him, and his eyes couldn't help but widen in sheer disbelief, and then even wider in frantic terror.

It was a horse dildo. As long as the rat's forearm, if not longer, and as thick as his bicep, it was an abomination to even think about how Jack would use such a thing on the bear. Unlike the toy still squatting in his cock, the dildo was as true as it could be to the stallions that inspired it. Blotches of black and pink patches ran along its entire length, encompassing the leathery texture of its rubber and varied only by the web of snaking veins everywhere else. At its base, two bulbous orbs, fashioned as best they could to look like a natural horse's sack, while at the other was its flare… A wide, blunt bludgeon, an engorged head atop a beast of a cock, and Randy did not want to think about how it was supposed to go inside him.

He fought harder than ever before in the chair, summoning some lingering strength in his voice to plead all over again for the rat not to do what he was inevitably going to do. The rodent simply disregarded him, taking his place before the bear.

“If you want to stop, you know what to do."

Their gazes met. Jack's face was cold but calm. Randy's, however, was slick with spittle and sweat, fur bedraggled, and his eyes wild.

He could rap his knuckles three times and Jack would stop. That's all he had to do.

The rodent's paw reached for the dildo still lodged within the bear's cock and took a firm hold of its base. Though it took some persuasion, he gradually pulled the toy back, withdrawing the mass from inside Randy as if it were some casual thing he had to do. For the bear, he had no time to take a breath, hissing loudly as his body once again became a stale vacuum, the toy dropping to the floor under its weight. He could feel the air tickling his own innards, like electricity licking down the length of his urethra. He felt empty. Impossibly empty. But his master had made him feel full, that was what felt right to him now, and he couldn't help but crave that feeling.

Even if it meant being full with a horse dildo.

Jack had paused, one paw holding the bear's cock again while the other wrestled with the toy, waiting for his boy's decision.

Despite how hard he clenched his fists, Randy never once tapped his knuckles. So Jack made his move.

“Deep breaths… I know this won't be easy."

Like before, the rodent positioned the bear's head to the dildo's flare, taking care more care this time to ensure everything was in proper order. Randy tried to do as he was told, slowing his breathing down from its panicked panting to something more leveled and measured. But he couldn't shake the fear from his system, adrenaline pumping in time with his heart, as the horse's flare nestled against the gaping hole of his urethra.

It was almost comical in how much larger the dildo was than his cock, even as stretched as it already was, and Randy would have sworn that it was going to be, in the end, just physically impossible. But Jack didn't appear to share the sentiment, as his face was locked in concentration and his paws cautiously working the two lengths together. Only when he seemed satisfied did his focus break, his eyes flitting up to look at the bear for a moment, before he pushed…

The pressure was immediate, the blunted head of the horse dildo making little success in pushing through the bear's cock. Randy growled out a haggard moan as he fought between the pain and pleasure, the aching husk of his body somehow finding the strength to power through the feeling. The amount of force the rodent required as patently cleared as his knuckles squeezed white, his bicep curled taut, and his arm trembled from the pressure he was placing on the toy. He breathed hard with singular determination as the bear surrendered however he could, pinned back in the chair as Jack forced the toy into him. The flare ground its way against his stretched urethra, still barely making any progress with its head, but Randy could feel it…

Slight, at first, but it was growing. The agonising, gut-wrenching sensation of something stretching. Skin pulled to its extreme, flesh thinned to make room, until…

“Fuck!"

Randy choked on a muffled scream as the pressure gave way. His cock had been beaten, battered down, and now bloated open as the head of the horse dildo was snug inside him. He lost all control of his breathing, any sense had been shot out of him the moment the dildo had forced its way inside, and he hung blindly in his bindings as he rode it out.

Jack's stunned shout had been only a momentary lapse in his resolve, as the rat's paws were already back holding the dildo and guiding it forward. With the questionably hardest part over, the bear's master was eager to make light work of sliding and shoving the rest of the toy into his slave's overstretched cock. One paw would pry and massage the bear's flesh, while the other negotiated the heaving mass of the dildo deeper and deeper down into the male's groin.

He could feel the sharp sting of his anatomy being strained to its breaking point, his cock no longer even feeling as if it were a part of his own body. The dildo's head dragged and dug deep inside him, and its veined length wormed through him eliciting such indescribable and unnatural sensations. He didn't know what he was supposed to, how he was supposed to feel. There was some urge to urinate, though his body seemed to refuse to impulse, while he desperately needed some kind of release. Yet he was the furthest from an orgasm at that moment, battling with the experience of the fake horse cock impaling through him.

It never seemed to stop. Deeper than the sounds, deeper than the first toy, and then deeper still, with the rodent responsible for driving it all the way. With his head still hung low, saliva leaking from his mouth, he could just about see the sight of his ravaged cock and the horse dildo protruding out from it. He was just in time to see the medial ring pass the breach of his head, the sight alone resigning himself to the finale of this depraved penetration. Closer and closer, the dildo's balls pulled towards his cock, and from within Randy could feel the toy finally reach the point the other had. The weight against his bladder was immense now, the need to piss so strong that it burned it all over, but he still couldn't. Even when he felt the horse dildo start to shift further in.

Buckling with the pressure, he let loose a simpering mewl as Jack refused to stop, pushing and pressing against the toy as it threatened to break down more of the bear's inner anatomy. Randy didn't want it to happen, Jack was on the verge of going too far, but there was no time to consider what to do. Something gave within him, a deep, hot pulse that swilled through his belly, and then the dildo slid inside.

He could barely breathe as the horse dildo once and for all reached its furthest depths just within his bladder, the head forcing open the bear's last remaining hole his master could have claimed, and he just sat there wallowing in the aftermath. Tremors rattled through him from head to toe, his body feeling uncomfortably cold and unbearably hot all at once, and there was nothing he could do but stare at the impaled horse dildo in his cock. Jack simply let it go, allowing both his stretched manhood and giant dildo to hang freely, ebbing and bobbing with every shudder he made.

Seconds passed, Randy suffering an eternity while Jack sat back to admire his work. There was quiet, with nothing but the bear's ragged breaths and pitiful groans breaking through the air. But then the rat spoke, softly and sincerely,

“Good boy."

Ignoring the dildo-filled cock, Jack's paws rubbed along his slave's thighs, tenderly stroking through the sweaty fur as he pulled himself closer to the bound male. His head was inches away from the bear's, his snout nuzzling to Randy's cheek as he cherished the moment of his boy making him truly proud.

“My good boy."

Randy didn't want to feel good, not like this, but hearing the words poured directly into his ear renewed that oozing warmth of joy deep within. It melted and coiled with the alien sensation of the dildo in his bladder, his flesh stretched wide, and his body broken down.

Then he heard a slight smirk, the sound of a sadistic smile painted in his voice,

“But you know Bryce is gonna be bigger than that…"