Dr. Decker restrains Rhino into a research facility where he performs a series of experiments to turn Rhino into a super hero. Many of the experiments involve growing Rhino's testicles and nipples to increase muscle mass and testosterone. Describe a series of slow methodical experiments where Rhino gets increasingly horny while having his nipples pumped and grown and his testicles grow to massive sizes and produce superhuman amounts of precum and sperm. Each orgasm shoots a gallon of cum.

Chapter 1: Introduction

The cold, metallic taste of fear filled Officer John 'Rhino' Rhodes' mouth as he awoke, his body bound securely to a table in an unfamiliar laboratory. The air was thick with the scent of antiseptic and the hum of high-tech machinery, a stark contrast to the smoky, whiskey-laced bars he was accustomed to on his days off. His heart pounded in his chest like a drumbeat of panic, and his muscles strained against the restraints, but to no avail. He was trapped.

His massive, muscular body was splayed out like a specimen, his bulging biceps and rock-hard abs on full display, the dark hair that covered them glinting under the sterile lights. A peculiar discomfort gnawed at him, starting from his chest and radiating downwards. He craned his neck, trying to get a better look at the source, and his eyes widened as he saw the devices attached to his nipples and testicles. They were unlike anything he'd ever seen, with wires and tubes snaking away from them, connecting to a bank of machines against the far wall.

His nipples, he realized with a jolt, were swollen to the size of small plums, the dark centers hard and distended. And his balls... fuck, they were massive, hanging low and heavy, barely contained by the stretched-to-the-limit pouch of his jockstrap.

"Ah, you're awake," a voice said, and Rhino turned his head to see a tall, muscular man with short brown hair and sharp, intelligent eyes. He was dressed in a lab coat, and he approached Rhino with a clipboard in hand, scanning it as he walked.

"I must say, Officer Rhodes, you're quite the specimen." His tone was clinical, detached, and it sent a shiver of unease down Rhino's spine. "I'm Dr. Victor Decker, by the way. I'm sure you're wondering what's going on."

"Yeah, I fucking am," Rhino growled. "And I'm not gonna lie, Doc, this shit is fucked up. What the hell have you done to me?"

Decker chuckled, a low, throaty sound that sent a chill down Rhino's back. "Oh, nothing too extreme. Just a little... enhancement.

You see, I've always been fascinated by the limits of human physiology. And you, my dear Officer Rhodes, are the perfect subject." He circled the table, his eyes raking over Rhino's body, lingering on his swollen nipples and massive balls. "The way your body responds to stimuli... it's extraordinary."

Rhino struggled against his restraints, the sight of Decker's leering eyes sending a surge of anger through him. "You're fucking crazy, you know that?"

Decker just smiled, a slow, predatory curl of the lips. "Crazy? Maybe. But also a genius.

And I have a feeling you're going to enjoy this a lot more than you think." He reached out and trailed a finger down Rhino's chest, leaving a tingling path of heat in its wake. Rhino tensed, every muscle in his body coiled like a spring ready to snap.

"Fuck off, Decker," he snarled. "And get your fucking hands off me."

Decker laughed again, that same low, throaty sound. "I don't think so, Officer. You see, the thing about enhancements like these is that they come with... side effects. And one of those side effects is an increased sex drive.

A significantly increased sex drive."

Rhino's eyes widened in realization. The discomfort he'd been feeling, the constant, gnawing ache, it was all coming from his nipples and balls. They throbbed in time with his heartbeat, the sensation growing more intense with every passing second.

"You son of a bitch," Rhino growled. It was all he could do to keep his voice steady, to keep the desperation and need from bleeding into his words. "You did this on purpose."

Decker leaned in closer, his breath hot on Rhino's ear. "Yes, I did.

And it's working beautifully, isn't it?" Decker's voice was a low rumble, his breath hot on Rhino's ear, sending a shiver down his spine. Rhino could feel his body responding, his cock straining against the confines of his jockstrap, desperate for release.

"Fuck," Rhino groaned, bucking his hips against the restraints. "You're a sick fuck, Decker."

Decker chuckled, his eyes gleaming with an almost feral light. "And you, Officer Rhodes, are a beautifully primal specimen.

Look at you, all bound and helpless, your body on fire with need. It's intoxicating." Decker's hand trailed lower, his fingers brushing against the swollen pouch of Rhino's jockstrap. Rhino's breath hitched, and he bucked his hips again, desperate for more contact.

"Fuck, Doc. You're playing with fire here," Rhino warned, his voice a low growl. His body was a live wire, every nerve ending on fire, screaming for release.

Decker smiled, his eyes never leaving Rhino's as he unbuckled the jockstrap.

"Oh, I know exactly what I'm doing, Officer. And I intend to enjoy every second of it."

Rhino's cock sprang free, hard and throbbing, precum already beading at the tip. Decker hummed in appreciation, his eyes darkening as he took in the sight. He wrapped a hand around the base, stroking slowly and firmly. Rhino groaned, his hips bucking into the touch, desperate for more. You're driving me fucking crazy here," Rhino growled, his body tense with need.

Decker chuckled, his grip tightening as he sped up his strokes.