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As a note to the reader, while characters in this story are over eighteen, the narrative contains descriptions of bondage, anal and oral sex, and body modification. If any of these acts offend you or are illegal to read where you reside, please move on. This is a work of fiction. Any resemblance to actual persons, living or dead, events, or locales is entirely coincidental.
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Chapter 6: Primal Awakening
The harsh fluorescent lights cast a sickly glow over Jeff and Jake. Doctor West had placed them together in a larger cage earlier in the morning. Jeff's eyes locked onto Jake's, a silent understanding passing between them as they acknowledged the changes overtaking their bodies. Jeff's heart raced, a mix of fear and something more primal surging through him. They embraced each other and began to cry.
"Jake," Jeff said, his voice deeper and raspier than usual. "Are you okay?"
Jake nodded, his own features shifting subtly.
"I think so. You?"
Jeff opened his mouth to respond, but a wave of pain overwhelmed him. He gripped the metal bars, muscles tensing as his elongated jaw, which had formed a partial muzzle, attempted to adjust to the new bone structure. His teeth had been sharpened to points. Then, a feeling stirred down below.
"Oh god," Jeff groaned, heat pooling in his groin.
From between his legs, his sheath pulsed. A red shaft began to appear – swelling and lengthening as it emerged. His canine cock revealed its final form. Soon, the urge to rut was overwhelming his body. Jeff's mind reeled. The changes horrified the part of him desperate to cling to his humanity. But another part - a growing, insistent - reveled in the new sensations. He couldn't tear his gaze from Jake's lithe form.
"I can't... can't control it," Jeff panted as he felt Jake's presence.
His paws shook as he fought the impulse to touch the younger beast.
"What's happening to me?" Jeff asked.
Jake crawled closer, eyes wide.
"Jeff, your eyes..."
Jeff blinked rapidly, his vision sharpening. His pupils dilated and pulsed. He could see every detail of Jake's face. His familiar scent mingled with something wild and musky. It was intoxicating.
"Jake, I..." Jeff swallowed hard. "I want... I need..."
He trailed off, shame and desire warring within him. But as Jake tentatively stroked his arm, Jeff knew he was fighting a losing battle against his new instincts.
Meanwhile, West observed the two subjects with clinical detachment, a smirk playing on his lips.
"Excellent," he purred. "They're progressing just as I'd hoped."
He typed furiously on a nearby console, entering data into his notes.
"This is fascinating! A mating ritual, perhaps? The dynamics between the two subjects are intriguing. Subject Two has developed pheromone glans in his ass. He appears to be entering a cycle of estrus. Subject One appears to have reacted immediately."
The tension in the air was palpable, a mix of fear and desire that electrified the space between them. Jake and Jeff's breathing grew ragged, bodies flushed and fur slick with sweat – highlighting their more animalistic versions of their former selves.
A scent soon permeated the air, released by Jake's glands. Jeff's nose detected it immediately. His heart hammered in his chest as he took a tentative step forward. Jake mirrored his movements, their eyes locked. It was as if they were dancing, each step carefully choreographed yet wholly unscripted.
Finally, they were inches apart, their heated breath mingling as they stared into one another's eyes. Jake's scent overwhelmed Jeff's newfound senses – a heady mix of arousal and apprehension. His long red, rigid cock, throbbed in anticipation. The knot at the base was beginning to swell.
"J-Jake," Jeff panted, his deep, animal voice hoarse with need. "I... I want you. I NEED you."
With a growl of longing, Jeff crashed their mouths together, his new, larger paws gripping Jake's hips to pull him closer. Jake whimpered into the kiss, his nails raking down Jeff's back, exacerbating the pleasure-pain sensation coursing through his body. Their hips rocked together in a primal rhythm, their hardening cocks grinding against one another as their bodies begged for more.
"Tell me you want this, Jake," Jeff growled, his voice deeper, more guttural than before. "Tell me you want me to fuck you, to claim you as mine."
"Yes, god, yes," Jake moaned, arching his back. "I've never wanted anything more."
Without further hesitation, Jake instinctively lowered his chest to the floor, his ass raised, and his tail moved up and to the side. Jeff moved behind him and stuck out his tongue, now long and dripping with saliva. He spread Jake's ass with his paws and licked the entrance to his ass – noticing how red and warm the tender skin was. Shoving deeper, he explored, and Jeff moaned as his small cock, still showing some human characteristics emerged from its sheath and dripped precum.
Jeff began to lap eagerly as the hole opened for him, then as he swirled his tongue around, he felt another opening inside, angled up inside Jake. Curiously, he pushed inside, and Jake moaned loudly – his swollen penis shooting a lob of precum on the floor.
"The secondary anal erogenous zone has been located!" West said excitedly.
Jeff tongued the area inside Jake's ass. The new opening seemed warmer and full of nerve endings. Jake's eyes rolled back in his head, his muzzle drooling as he whimpered. Jeff detected a new scent, and it drove his wolf-like mind mad. He could take it no longer. He pulled out and mounted Jake quickly. His transformed cock – now thicker and longer, with a pronounced curve – quickly breached Jake's asshole in one searing thrust. He instinctively angled his baculum upward and entered the new internal opening and felt an unmistakable sensation as his cock slid inside. They both gasped in unison, the pleasure overwhelming in its intensity.
As they moved together, their bodies harmonizing in this ancient dance, they knew their fates were sealed. The changes that had been set in motion would not be stopped, but at this moment, they didn't care. The only thing that mattered was the heat between them, the fire that threatened to consume them both as they embraced their newfound lust, their newfound lives, and the newfound love that blossomed between them even as their bodies changed.
Dave's heart hammered in his chest as he watched Jeff and Jake fuck. The sight of their bodies contorted and shifting was mesmerizing and terrifying. His own transformation had been just as harrowing.
Craning his neck, Dave gasped as he caught sight of his reflection in a metal box near his cage. Copper and blonde-colored fur now covered his body – part wolf and part bear. His arms were thickly muscled, ending in sharp claws. He flexed them experimentally, marveling at the power coursing through his veins.
Jeff had pinned Jake to the floor in the nearby cage, his newfound strength and size dwarfing the slim blond shape below. The image caused an ache in Dave's groin. A massive dark red cock emerged from his furry sheath. Clear fluids began to dribble from the tip as it lengthened and engorged. Dave's eyes were locked on the scene.
Jeff's hips were frantically thrusting, and Jake was moaning in desire. Their asses were pointed in Dave's direction. Their newly formed tails were wagging. Dave could see the knot swelling larger at the base of Jeff's cock. It soon was pressing against Jake's asshole.
"Jesus," Dave breathed, unable to form coherent words.
He was both appalled and aroused by the display before him.
With a growl that was half animal, half man, Jeff plunged his knot into Jake, the bulbous gland disappearing inside the other creature's body in one swift shove. Jake clenched his teeth. Drool spurting from his muzzle. He arched his back and cried out, the sound somewhere between pain and pleasure. Fluids were now shooting out of his smaller half-human half-canine cock and coating the floor below.
Dave was in a rage. His hormones were taking over. He growled loudly and threw himself against the door of his heavy metal cage as the two canine creatures continued to copulate. Jealousy overtook him as he smelled the pheromones in the air. West just smiled and made notes of everything that was happening.
Jeff's knot popped out of Jake's ass, and a spurt of clear fluids splashed out at the same time. The older canine creature had been pumping pre-ejaculate deep into Jake's ass, coating the new opening that was inside and creating more lubrication. Jeff grunted as his loins burned. He thrusted hard and shoved the knot back inside. Jake squealed. The lips on his muzzle were quivering as his tongue fell out, and he began to pant.
Jeff's knot then locked in place – swelling, so they were now tied. The pressure on the organ, now swollen to the size of a racket ball, caused his huge testicles below to jump. His reproductive system fired on all cylinders, and shot after shot of thick cum filled Jake below him. The orgasm was overwhelming and continuous. Jeff locked his arms around Jake's chest, leaned down, and bit on the younger beast's neck hard.
Jake squealed. He could feel the pressure in his ass from the large knot and the warm fluids filling up his insides. The sensation caused his body to shutter, and his cock throbbed, shooting out three ropes of cum as he had a quick but intense orgasm. His fur stood on end, and his elongated clawed paws clenched as he rode the wave.
"Excellent!" Doctor West shouted again as he rapidly wrote in his notebook. "It is amazing the difference the slight alteration to the sequence has caused. Subject One retains the more canine form with dominant male behavior. His reproductive system has now altered to a three-stage process: the initial clear pre-ejaculate stage, the sperm-rich fraction or SRF, and finally, a clear prostatic fluid stage. The knot has effectively locked into place, and Subject Two's new erogenous zone inside his ass was penetrated easily."
West turned the page and continued to write.
"Subject Two has retained more human reproductive forms, though the organs have reduced in size, as expected. The baculum appears present but is slender and gracile. The head of the penis has retained the form of a homo sapiens glans. The ejaculate is similar to that of a human, though the pre-ejaculate was clear and constantly flowing before orgasm like the more canine creature. Make a note at autopsy to examine the seminal vesicles and prostate. Full dissection of this weird transitional organ may be necessary for future study."
"Subject Two released pheromones before copulation began, and additional releases were emitted from its new anal organ when stimulated. Make a note to sample these fluids to test for chemical makeup at a later date."
"Subject Three became excited watching the mating of his two companions. No doubt he also senses the submissive's scent and wants to breed. Given the observations made before capture, his carnal feelings for them both have likely been enhanced by the transformation. His cock, almost purely canine in form, is much larger and swollen than Subject One's. It will be interesting to observe its copulation pattern."
Jeff was panting as he held on tight to Jake below. His ass slowly thrusted as his cock stopped shooting sperm and switched to thinner prostate fluids. The orgasm was waning but still occurring, and the pressure on his knot felt amazing. It had been five minutes, and the endorphins still flooded his transformed brain. It made him completely blind to anything happening around him. Soon, he felt an overarching urge. He released his bite on Jake's neck and let his arms relax from their grip around the younger beast's chest. He pulled up, and with a glazed look in his eye, he instinctively lifted his leg and began to turn.
As his leg swung over Jake's body, Jeff's knot deep inside the younger beast's ass began to rotate. Jake groaned as he felt the movement.
"Fuck!"
Jeff was in post-orgasmic bliss. He continued to turn until he was on all fours again, ass-to-ass with Jake, his cock still locked inside and pulsing clear fluids.
"Subject One has turned," Doctor West wrote. "This behavior was not seen in other subjects but common in the canine animal. Fascinating!"
Jeff closed his eyes and panted as he continued to enjoy the sensation for the next ten minutes. Fluids slowing but still trickling into his mate. His chest heaved up and down below him as his knot stayed swollen and locked into place.
Dave was now feral. His need to fuck was strong. His cock was now nine inches long and bobbing below him. Juices were continually pulsing out of his prepuce like a water hose, and a large knot at the base was swollen, red, and angry. His enormous balls were hot and sore.
The older beast's mind was in overdrive. He reached down and rubbed his paw over his swollen member, and he growled loudly. His muzzle shuttered as his tongue fell out, and globs of spit rolled out over his bushy mustache and beard, which dripped to the floor. He gripped his thick tool and began to stroke it. His large hips thrusted at the same time. He grabbed onto the bars of the cage with his free paw to steady himself as he masturbated.
"Subject Three has now started to self-pleasure himself out of frustration," West replied. "Timing the event to compare with previous bear hybrid subjects."
Dave closed his eyes and growled loudly. His sharp teeth clattered as he stroked faster. Pre-ejaculate was flying around his cage, coating the floors and bars and landing on the floor beyond. His hips were gyrating quickly as his legs shivered. His panting increased as the huge knot at the base of his cock swelled to its full extent, much larger than Jeff's. When Dave's paw hit the organ and he squeezed it, his brain went into overdrive.
The orgasm Dave experienced nearly caused the beast to collapse. Continuous thick ropes of cum erupted from his cock as he howled and growled loudly. He grabbed onto both sides of the cage to steady himself and leaned back as his cock throbbed, pulsed, and shot semen.
"FUCK!" Dave screamed as he collapsed backward, unable to handle the experience.
As his eyes rolled back and ropes of cum shot up and over him, covering his fur, West wrote feverishly.
"Subject Three orgasmed and has an amazing semen volume. Note to sample and test for potency. Will definitely need to remove and preserve the organ at autopsy for study at a later date."
The room began to smell of musk and cum as the three former fraternity brothers recovered. Jeff felt his orgasm finally starting to wane, and his knot began to shrink. He instinctively pulled forward, causing his cock to pop out of Jake's ass and flop under his belly. As he moved to the corner to curl up and lick the head of his penis clean, Jake groaned. Cum was dribbling out of his ass, and he collapsed on the floor on his side in exhaustion, soon falling fast asleep.
Dave was in a type of post-orgasmic bliss for almost fifteen minutes – comatose while his cock transitioned to shooting clear prostatic fluids that slowly reduced to a dribble. When the organ finally stopped, and the knot began to deflate, he ran his paw over his face.
"Fuck!" Dave groaned as his senses returned to him.
He looked down to see a massive volume of cum covering his chest and the floor. It was as if he had spilled a soda can's worth of thick, watery glue all over himself. He reached down and stroked his now disappearing cock as it slipped back inside his sheath and moaned.
"Fucking hell," Dave replied with a deep voice as he shook his head. "What was that?"
"That, Subject Three, is how your new reproductive system works," Doctor West said as he closed his book and grabbed a test tube to collect some of Dave's sperm on the floor. "It works better when you are tied to your mate like your friends were earlier, but you will get a chance to experience that soon."
Dave snarled and lunged at the cage as West neared. It startled the doctor initially, but once he realized he was at a safe distance, he collected the fluids flowing out of Dave's cage and pooling in the room.
"Better watch that temper," West said. "You don't want to hurt that new body of yours."
Dave growled again and tried to reach for the man with his sharp claws, but he could not make it.
"If I get my hand on you..."
"Paw," West corrected with a smile. "You have paws now. Let's be sure to use the right terminology."
Dave seethed as West turned and left the room, closing the heavy metal door and latching it behind him.
In the stillness of the room, Dave could hear Jeff panting. The creature that was once his little brother in the fraternity had cleaned his cock off, and the organ had retreated back into his sheath. He was now on his back, recovering.
"Jeff," Dave said in a low, gravelly voice. "Jeff are you still in there somewhere?"
Jeff moaned as he pulled himself upright. He shook his head and looked over at Dave. He smiled, teeth protruding through his lips on the side of his muzzle.
"I'm still me, Dave," came a low and deep voice. "At least partially."
"What about Jake?" Dave asked as he grabbed the bars of his cage and stuck his muzzle in between.
Jeff took a deep breath and crawled on all four limbs over to Jeff. The posture seemed much more natural than walking on two feet. His front paw reached out and rubbed the fur covering the younger beast's side. Jake's lower leg shook, and he opened his eyes and smiled. His tongue ran over his teeth and around his snout.
"Hey there," he said with a soft but deep voice like theirs. "That was fucking amazing."
Jeff's eyes softened as he used his nose to rub next to Jake and licked him.
"Yeah, it was."
"Are you okay?" Dave shouted louder.
"I'm okay, big guy," Jake replied as he pulled himself into a sitting position, his paws resting in his lap.
Jake reached down and ran his paw over the cum on the floor, a mixture of his own and what fell out of his ass when Jeff pulled his knot out. He brought it to his mouth and sniffed hard, his body shaking as he licked his paw clean.
"Fuck, that does something for me," Jake groaned.
"You looked like two dogs in heat," Dave replied. "You even tied and turned on him, Jeff!"
Jeff groaned as his paw went for his sheath and rubbed it and his balls.
"I know. It was so fucking weird. It felt right, though. And I was orgasming the whole time. I could barely think!"
"Yeah," Dave replied as his paw pointed to the ground. "Look at all this cum I made! I was orgasming the whole time, too. I could bathe in this shit!"
Jeff chuckled.
"You should experience it in our pledge's ass. And speaking of which... your ass is different, Jake!"
Jake looked up at him inquisitively.
"What do you mean?" Jake asked.
"Just inside your ass, there is another opening or something," Jeff replied. "It is weird. It has this taste inside that drove me wild, and my cock instinctively angled right in there."
"Oh fuck!" Jake groaned. "I remember. When you pushed inside me, it felt so different. It was like fireworks were going off all over my body. I was precumming continually."
"I saw!" Dave replied. "But your cock looks different than ours!"
Jake reached down and rubbed his soft shaft that had retreated partially into a furry sheath. This tip was still human-like, but he could feel a thin, rigid structure inside.
"My dick has a bone!"
Jeff laughed.
"It's called a baculum. Most animals have them. It helps in mating."
Jake rubbed the small mound of fur where his balls were.
"My balls feel smaller, and my sack is barely hanging out of my body. I used to be pretty hung!"
"I remember," Jeff smiled. "I liked feeling those swinging things when I fucked you."
"What has happened to us?" Jake said. "We look like some sort of mutated werewolf."
"Or werebear," Dave replied. "That's what that doctor called me."
"Well, you do have the look of a bear now," Jeff replied. "Your chest is huge now."
"Yeah, but my legs are thick and short," Dave replied as he sat down. "It is weird trying to stand now. My bones feel different. It is easier to be on all fours."
"Same here," Jeff replied. "I think that is the point. We are taking on the aspects of the animals we were modified to be like."
"Can we be cured?" Jake replied, a tear in his eye.
Jeff ran his muzzle over Jake and licked his face lovingly.
"I don't know, Jake. I don't know."
Jeff's lips shivered as he caught the scent of Jake again. His loins burned and began to stir. As the red-tipped appeared again, he growled.
"I need..."
"Again?" Jake asked, amazed.
"Yes!" Jeff growled almost menacingly.
Jake's eyes widened as he saw the feral nature of Jeff's expression. Dave could sense it, too. His mind clouded, and he shook his head. Dave growled and threw his body against the cage.
"That's mine!"
"No!" Jeff growled back. "He's mine!"
Jake became nervous as Jeff threw him on his stomach and mounted his ass again. As Jeff's cock slid deep, Dave repeatedly threw himself against his cage in a jealous rage. Jeff bit down on Jake's back again as the knot entered and swelled to tie.
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As with my other stories on Nifty, I accept and love to get constructive feedback and criticism from my readers. You can contact me at slavebear1976@gmail.com