Comic by Yetigo
Professor Tok sat back, tentacles steepled, relishing the symphony of Juro's agonized cries as student after eager student took their turn sounding the helpless human's urethra.
The human sobbed and writhed on the breeding bench as one after another a slender rod was inserted into his channel. The alien professor drank in every whimper and moan, relishing how Juro's cries grew more desperate and broken with each intrusion.
"Excellent technique," Professor Tok praised as a student worked a fluted steel sound in with exquisite slowness, twisting it slightly to make Juro yelp. "See how the lining stretches and molds itself to the shape? With repeated sessions, his body will allow easier insertion. Indeed, the subject may come to always need something in his urethra."
Juro could only shudder and gasp as the unyielding metal pushed deeper, rubbing against raw nerve endings. He could feel every bump and ridge scraping his tender insides, painful but with an undercurrent of reluctant pleasure that made his cock twitch. Tears of humiliation streaked his face as alien appendages fondled his shaft, keeping him hard and leaking but never letting him find release.
"P-please, no more," Juro stammered out between probes, voice hoarse from begging. "It hurts, I can't take it..."
"Shh, you're doing so well," Professor Tok soothed mockingly, tentacles petting Juro's trembling flanks. "Just a few more. We need to make sure everyone gets a turn."
The human's reactions were exquisite, his body singing with torment. Humiliated tears carved glistening trails down Juro's contorted face, his features twisting into a rictus of pained ecstasy. Choked pleas and garbled begging spilled from his lips, the sounds sweet as ambrosia to Professor Tok's auditory receptors.
While the students busied themselves with Juro's increasingly sloppy slit, the alien's gaze drifted higher, to where the powerful anal pump was ruthlessly milking Juro's tender rim. He hummed in approval. The human's most intimate flesh was pulled deeply into the cylinder with each cycling of the vacuum, blooming like some obscene flower. Professor Tok practically salivated imagining how gorgeously puffy and swollen that delicate ring of muscle would be after such prolonged suction. Soon it would be time to fill that succulent void once more.
Professor Tok's tentacles shivered in anticipation. "Magnificent," the alien murmured, tracing around the pump’s edge with a tentacle tip. "Like a ravenous little mouth, so ready to be filled."
Once every student had taken their turn violating Juro’s dick chute, Professor Tok finally called a halt.
"Excellent work, all of you," the alien praised, eyeing Juro's inflamed slit with clinical satisfaction. "The subject's penile structures have been thoroughly stimulated. I believe we've made great strides in dissociating pleasure from this vestigial organ."
Juro could only sob, his cock was throbbing, an angry red from the repeated invasions. He felt like he'd been rubbed raw inside and out, his insides scoured and scraped and prodded until every nerve ending felt flayed open.
Professor Tok turned his attention to the devices still mercilessly pumping Juro’s chest. The human's nipples had swollen to twice their normal size, protruding like giant ripe raspberries from his chest.
The anal pump was also still ruthlessly tugging on Juro's anal tissue, the delicate flesh pulled taut and straining. His opening looked puffy and bruised, exquisitely sensitive.
"I believe the mammary and anal training has progressed sufficiently for now," Professor Tok declared. With a few deft motions of his tentacles, he detached both devices.
Juro whined low in his throat as the pumps were released with a soft hiss.
“Excellent,” Professor Tok hummed. The subject’s anus was plumped up and a delicious shade of red. It looked more like a female hominid’s vulva than a male’s anus.”
Juro moaned as his nipples throbbed in time with his pulse. His chest felt fuller and heavier and there was a strange ache building behind his nipples, an unfamiliar pressure.
Professor Tok manipulated the controls of the breeding bench again, repositioning Juro's limp, unresisting body until he was reclined down to a less extreme angle. His legs though were still kept spread open, putting Juro’s cock on display. The alien loomed over him, something triumphant and hungry in their gaze as they took in the human's debauched state.
Professor Tok loomed over Juro's trembling form, something ominous and anticipatory in his bearing. The alien reached for a gleaming tray of instruments, selecting a thick syringe filled with a viscous purple fluid.
"Your body has progressed beautifully in its adaptation and training," Professor Tok mused, tapping the syringe with a tentacle tip. "But there is one final vestige that must be...remodeled before you can truly achieve your new purpose."
Juro's exhausted mind struggled to parse the alien's words, still reeling from the painful sounding his cock had just endured. Sluggishly, his gaze tracked downwards to his own ravaged genitals. His penis lay limp between his legs, the flesh bruised and swollen, the tip raw and chafed, leaking a steady dribble of fluid.
Surely there was nothing more they could do to him?
Professor Tok followed Juro's gaze, chuckling darkly. "Ahh, I see you've guessed what's in store for this stubborn bit of anatomy." The alien trailed a tentacle along the human's shaft, making Juro flinch and whimper. "As impressive as your resilience has been, this structure is simply not conducive to your new role. It must be...repurposed."
Juro shook his head weakly, fresh dread coiling in his gut. "W-what are you going to do to me?" he croaked out, voice ruined from screaming.
Professor Tok held up the syringe, the violet contents catching the light. “This, my dear subject, is the key to your final transformation. A potent cocktail of hormones, DNA modifiers, and mutagens that will...shall we say...reshape your masculine anatomy into something far more suitable for the experiment."
The alien touched the syringe tip to the base of Juro's penis, right above his balls. Juro jolted as if electrified, trying instinctively to twist away, but the restraints held him fast.
"Please, don't, not that..." Juro babbled, tears of desperation leaking from the corners of his eyes. His cock gave a pathetic twitch, trying to retract from the looming needle.
"Shh, it is a necessary step," Professor Tok soothed, his tentacles firmly grasping Juro's shaft and balls, holding them in place. "This troublesome organ will only be a distraction, a focal point for misplaced arousal."
With clinical precision, Professor Tok slid the needle into the delicate skin at the root of Juro's cock and depressed the plunger, emptying the syringe's contents into the base of Juro's shaft. The human let out a strangled wail as liquid fire spread through his groin, radiating outward from the injection site. Almost instantly, he felt a strange tightening sensation, like his cock was trying to retract into his body.
To Juro's horror and the alien's fascination, the human's penis began to shrink and pull inward. Inch by inch, the shaft retreated, the skin growing smooth and taut. Juro wailed as he watched his manhood dwindling, the once proud organ reduced to a small, puckered nub nestled at the apex of his groin.
"Observe how the penile tissue is reabsorbed, the erectile structures broken down and repurposed," Professor Tok narrated clinically. "The testosterone-producing cells are being converted, redirecting blood flow and sensitivity to other, more pertinent areas."
Juro could only whimper and shake as his cock disappeared, leaving behind a plump, glistening mound that throbbed with unnatural sensitivity. The alien prodded the tender flesh, making Juro jerk and gasp.
"See how the glans has been transformed," Professor Tok remarked, flicking the engorged nub with a tentacle tip and drawing a startled cry from the human. "All the pleasure-giving nerve endings concentrated into one exquisitely sensitive little bud, primed for stimulation."
The alien pinched the little nub of flesh between two tentacle tips, rolling and massaging it. Juro gasped as shockwaves of intense sensation radiated out from that single point. It felt like every nerve ending from his cock had been condensed and concentrated into that one hypersensitive bud.
"Magnificent," Professor Tok breathed. "Look at you - your masculine organ transformed into a perfect little pleasure button. So eager for stimulation."
The writhing, weeping human was a sight to behold, splayed out obscenely with his most intimate anatomy restructured before the class's fascinated eyes. And Professor Tok was far from done with his demonstration.
The alien reached for another syringe, this one filled with a syrupy, iridescent liquid. He pressed the needle to the delicate skin of Juro's taint, right behind where his testes hung heavy and tight.
"P-please, stop, don't take those too!" Juro begged, knowing it was futile. He could feel his balls drawing up in fearful anticipation of the injection.
Professor Tok tisked, shaking his head. "Silly boy, I'm not going to remove these. They still have an important role to play in your new anatomy. We're simply... repurposing them."
With that, the alien sank the needle in, piercing through the thin barrier of skin to push the fluid directly into Juro's scrotum. The human shrieked as searing pressure engulfed his sac, his testes swelling obscenely against their fleshy prison.
Professor Tok withdrew the needle from Juro's taint with a satisfied hum. "Observe how the testes ascend, pulled up into the inguinal canals to nestle snugly in the groin. Note their increased size and firmness - the mutagens are already stimulating accelerated spermatogenesis and seminal fluid production."
Juro sobbed as he felt the nauseating internal shift of his balls moving inside him, pulled unnaturally high and tight in his pelvis. They throbbed and ached fiercely, swollen with their altered purpose. His scrotum, now empty, slowly shrank and smoothed out until just a small pouch of silky skin remained.
"These repurposed testes will now fulfill a new role," Professor Tok explained, prodding at Juro's reforming groin. "Rather than simply producing seed, they will act as glands to provide natural lubrication for the subject's rectal tract, much like the Bartholin's glands in the human female."
The alien dipped a tentacle between Juro's cheeks, swiping it over his freshly-pumped rim. It came away glistening with a thick, slippery fluid. "Fascinating. Observe how the secretions have already begun. The repurposed testes are functioning perfectly, providing ample lubrication to ease penetration and enhance stimulation of the rectal erogenous zone."
Professor Tok pushed the tentacle deeper, sinking it into Juro's slick hole. "As you can see, the subject’s reproductive structures have no been fully optimized for his role in our experiment."
Juro shuddered and whined as he felt the slippery secretions coating his insides, a perverse natural lubricant preparing him to be bred.
His reformatted anatomy throbbed and pulsed, still settling into its new configuration. The absence of his cock and balls left him feeling horribly exposed and vulnerable. All that remained of his manhood was that single, hypersensitive bud, glistening and swollen at the apex of his smoothed groin. Meanwhile, his hole felt slick and open, clenching needily around the probing tentacle.
Professor Tok pumped his tentacle a few more times, relishing the human's choked mewls, before withdrawing with a wet squelch. He held up the dripping appendage for the class to see, the slick fluids coating it catching the light obscenely. "The subject’s body knows its purpose now. We shall resume insemination attempts again immediately."
Professor Tok turned to Zix'ka, compound eyes gleaming with dark satisfaction. "The subject is now fully prepped and ready for the next round of breeding. However, before you begin, we must ensure his newly formed structures are primed to maximize receptivity and sensitivity."
The mantid-like alien nodded, mandibles clicking in understanding. "Of course, Professor. I will prepare my ovipositor while you ready the pump and clamps."
Professor Tok busied himself selecting several gleaming devices from a nearby tray. He held up a small, clear cylinder with a flared opening, similar to the one used on Juro's rectum earlier, but much more petite in size.
"This will be perfect for stimulating your new structure," the alien remarked, positioning the device over the swollen, glistening nub crowning Juro's groin. "The suction will engorge the tissue and expose the nerve endings, making it exquisitely receptive to the ovipositor's stimulation later."
Juro shook his head weakly as the cylinder sealed around his hypersensitive bud with a soft hiss. Almost instantly, he felt a rhythmic tugging sensation as the machine began to pump, sending bolts of unwanted pleasure lancing through his core.
Professor Tok hummed approvingly as he watched Juro's “clitoris” swell and darken, pulled to prominence by the incessant suction. The human writhed and keened, overwhelmed by the intensity of sensation in his altered flesh.
Satisfied, the alien professor turned his attention higher, to Juro's chest. The human's nipples were still puffy and tender from their earlier milking, protruding temptingly. Professor Tok selected two viciously toothed clamps from the tray, the metal gleaming coldly under the harsh lights.
"Continued stimulation is necessary to accelerate lactation and ensure your mammary glands are productive enough to nourish the young," the alien explained almost gently as they positioned the cruel devices over Juro's vulnerable nubs. "These clamps will provide a constant pressure and prevent any backflow."
Juro gave a strangled yell as the clamps bit down, the sharp teeth sinking into his tender flesh. Agony radiated across his chest, arcing down to his groin to mingle perversely with the maddening suction on his proto-clit. His back arched futilely as he strained against the inescapable stimulation.
Behind them, there was a sinister buzzing sound. Juro's tear-blurred eyes widened in horrified awe as Zix'ka approached the breeding bench, the mantid-like alien's ovipositor shone under the harsh lights. It looked like a wasp’s stinger.
Juro whimpered, trying weakly to press his thighs together, to shield his vulnerable entrance. But the restraints held him splayed wide, his freshly pumped anus twitching and glistening with the perverse secretions of his repurposed testes.
Professor Tok noticed Juro's horrified fascination and chuckled. "Ahh yes, the Goggalan's reproductive apparatus is quite intimidating, isn't it? Zix'ka's ovipositor is specially adapted for injecting his mate with a potent adhesive to secure his fertilized eggs inside their incubating body."
The alien professor extended a tentacle, swiping it through the amber fluid dripping from Zix'ka's tip. The appendage came away trailing gooey strings, the consistency more like syrup than semen.
"This substance is a remarkable organic polymer synthesized in the Goggalan male's accessory glands. Not only does it serve as a sealant to hold the eggs in the optimal position for gestation, but it also contains an enzyme that encourages the zygotes to latch onto the host's intestinal lining to leech nourishment."
The mantid reached out with one segmented limb, trailing the pointed tip down Juro's body in an almost tender caress.
"Shhh, easy now," Zix'ka crooned, his multi-toned voice taking on a soothing cadence. "There is no need for distress. Let your body relax and accept its purpose."
As he spoke, Zix'ka released a fine mist from glands at the base of his throat. The particles caught the light, drifting down to settle over Juro's trembling form in a fine shimmering veil.
Almost instantly, a languorous warmth began to spread through Juro's body, radiating out from every point the strange dust touched. It sank into his skin, dissolving into his bloodstream, suffusing him with a euphoric lassitude.
Juro's eyelids fluttered and he let out a shuddering sigh as the aphrodisiac powder took hold, blunting the sharp edges of his fear and replacing it with a hazy, throbbing need. His terror, so sharp and immediate just moments before, now felt distant, drowned out by the growing ache in his loins.
His altered anatomy throbbed, a molten heaviness settling low in his abdomen. The cruel suction on his proto-clit intensified, pulsing in time with his heartbeat, each rhythmic tug sending sparks of pleasure lancing up his spine to scatter like fireworks behind his eyes. His nipples itched, the bite of the clamps fading to a delicious ache, the pressure in his chest building to an unbearable fullness.
And his hole...oh gods, his hole. It flexed, eager and empty, slick muscles clenching with urgent need. Lubricant drooled from his twitching entrance, his body shamelessly anticipating the breeding.
"P-please," Juro whimpered, humiliation and need warring in his foggy mind. "I-I can't...I need...need you inside...fill me!" The words spilled from his lips, the drugs and conditioning overriding the last shreds of his shame.
Zix'ka hummed in approval, mandibles clicking with satisfaction as he watched the human succumb to the chemical's effects.
The insectoid alien wasted no time climbing atop the breeding bench, hovering over Juro's spread-eagle body. His clawed limbs clicked and scraped against the metal restraints as he positioned his stinger. The wicked tip pricked Juro's delicate flesh.
With a small flex of his abdomen, Zix'ka stabbing his ovipositor deep into Juro's glistening hole. The penetration was shockingly sudden, the stinger speared Juro with sickening ease, aided by the copious fluids drooling from his altered anatomy.
Zix'ka released another cloud of shimmering dust from his thoracic glands. The fine particles settled over Juro's sweat-slicked skin, dissolving into his pores, sinking into his bloodstream. A fresh wave of searing need crashed over the human, drowning out the last whispers of his resistance.
Juro's hips began to move of their own accord, undulating against the cold metal of the bench, trying to work himself further onto that piercing shaft. His greedy hole rippled and clenched, muscles fluttering along Zix'ka's length as if trying to draw the alien deeper. Wanton mewls spilled from Juro's slack mouth, punctuated by sharp cries every time the barbed tip grazed his prostate.
"More, p-please," Juro heard himself babbling, lost to the chemicals pumping through his veins, to the searing ecstasy of being stretched and filled and used. "I need it, need you so deep, breed me, fill me up, please please please..."
Zix'ka crooned his approval, his secondary arms coming up to fondle Juro's heaving chest. Sharp claws pricked at the soft flesh, skirting the edges of the clamps, making Juro gasp and shudder.
Just as Zix'ka began to piston his thorax, pumping his stinger in and out of Juro, a shrill alarm suddenly blared through the room. Red lights flashed and a robotic voice announced: "INTRUDER ALERT. INTRUDER ALERT. Unauthorized personnel have breached the laboratory perimeter. Initiate emergency protocols."
Professor Tok's head snapped up, a rare look of concern on their usually impassive face. They turned to the mantis-like alien still rutting into the helpless human. "Zix'ka, cease immediately. We need to secure the subject and evacuate."
Zix'ka clicked in frustration but obeyed, his ovipositor sliding out of Juro's grasping heat with a wet squelch. Juro whined at the sudden emptiness.
Professor Tok was already manipulating the controls of the breeding bench with deft tentacles. With a series of clanks and whirs, the apparatus began to shift and change. The metal restraints retracted and the platform folded in on itself, panels rising up to encase Juro's splayed body like a cocoon.
Juro yelped as he was jostled, his limbs folded up against his chest as the box closed around him. His reformatted anatomy throbbed with denied arousal, his sensitive folds rubbing together maddeningly in the tight confines. The clamps on his nipples pinched cruelly and the cylinder continued to suck at his swollen nub, milking him mercilessly in the darkness.
"The containment unit will keep the subject secure while we deal with this intrusion," Professor Tok explained hurriedly to the anxious students. With that, the alien turned and glided swiftly out of the room, beckoning for the students to follow. Within moments, the laboratory was empty, the heavy door sealing shut with an ominous thud, leaving Juro trapped and alone in his high-tech prison.