The phone broke through his cloud of sleep.
“Fuck,” Greg said, turning around in the sofa and knocking a few things off the table as he searched for the source of the ringing. He turned it on. “Hello?”
“Greg,” the doctor’s voice said on the other end. “Just reminding you to come back to the clinic and get the other two shots. What time should I put you down for?”
“Wha?” Greg said drowsily.
The doctor didn’t pay attention to the question. “I’ll put you down for ten. That should give you enough time to get dressed. I will see you then. And don’t forget about the notebook, please.” The line clicked off before Greg could get another word out.
He rose groggily from the sofa, his mind a mass of confusion. He vaguely remembered what happened last night. All he could remember was seeing how huge he was...
The thought caused his cock to throb painfully against his belly, and he clutched it without thought, causing a tidal wave of pleasure to crash against his mind.
“Fuuuuck...” he moaned out, leaning back and spreading his legs. The action caused his cock to burble out a thick wad of pre that soaked into his hand. The feeling of the sticky warmth was too much to deny, and he started to stroke himself to his first orgasm of the day. He shimmied down the seat a bit and reached down to his ass with the other hand, the fingers teasing and lightly probing the tight pucker there.
He groaned deeply, his cock drooling more of the pre, to which he used to wet his fingers for additional play. After a few gentle probes, he pushed a finger into his ass, then two, then three.
“Ah fuck yes!” he yelled out, surprised at the amount he could take with such ease. He started to fuck himself on his fingers, moaning and groaning as he rode himself into an orgasmic pleasure so strong that he cried in joy, his cock shooting out streams of thick, hot, and sticky cum.
The orgasm melted into a magnificent feeling of relaxation. Greg sighed in deep satisfaction, leaning back and rubbing the load into his furry chest.
He glanced down to see a thick mass of pectoral muscle that reminded Greg of two huge pillows. Covering them was a heavy pelt of white fur, the coat mixed with streaks of his cum. He reached up to grope the pecs. Yep, he thought as he felt the solid muscle, these are mine. And they are huge.
Then he brushed against a chest nub.
He groaned, his hand instinctively rubbing it harder, the fingers pinching and twisting the sensitive eraser-sized flesh as the other started to stroke his cock. Waves of pleasure cascaded though his mind as he milked himself to another mind-blowing orgasm.
“Fuck...” he said afterwards, slowly rubbing his cock and his balls. He was certain that they were both bigger, but he didn’t care. He would be more than happy than to keep jerking off all day. But he needed to make the appointment.
He rose up and stumbled a bit, trying to adjust to his surroundings. Everything looks smaller, he thought as he went to the bathroom. He glanced at the mirror and froze in shock at what it showed him.
He was huge. Bigger than big. Easily bigger than the guys from the gym. Combined, even! Every muscle defined and covered in white fur with black stripes. And his faceHe leaned over the sink to look closer. He pressed against the oddly-shaped nose, flattened against a pouchy muzzle. Steely grey eyes replaced his brown ones, the pupils slightly oblong. He opened his mouth and found his teeth unchanged. The ears gave the appearance of being higher than they usually were, but a quick inspection told him they were not.
“Wow,” he said, noticing his voice deepened to a rich bass. “Damn,” he said, to make sure it was not a trick of the ears. He stepped back from the sink and gave a good look at himself. He turned sideways a bit so he could see a thick, powerlifter rump, high and bulky. And his cock! He swore loudly when he saw the piece of equipment dangling down between his legs. Much thicker than last night, almost as thick as a can of sauce. With balls the size of mangos, encased in a heavily furred sack.
He raised an arm and flexed it, the bicep forming into a football of heavy muscle. He leaned over and nuzzled it, rumbling deeply at the size. He felt his cock stiffen, and he grabbed it, rubbing slowly, and getting his hand slicked up with the sudden river of pre.
He couldn’t resist this, and he didn’t want to. He breathed deeply, inhaling a rich manly scent that caused his cock to spit out more pre. He nuzzled harder, slowly extending the arm then flexing it back to massive hardness. He moaned softly, lost in the pleasures of self-worship. His mind cast back to the two he saw at the gym, and imagined them bigger, thicker.
Another tidal wave of lust, and he came again, this time so strongly that his knees buckled. He fell against a wall, pinching his eyes shut and moaning at the insane pleasure he was feeling. He was stroking with two hands now, thrusting himself in their grip as he kept on shooting on the mirror, on the sink, everywhere.
The orgasm petered to the afterglow, and he opened his eyes to find the bathroom covered in his essence. He stood up and took a deep breath, finding that the room stank his musk, the rich scent making his cock twitch. He growled softly, eager for another session, but he needed to get to that appointment.
Showering took longer than possible, seeing he needed to wash all that fur on him. After a few mistakes with a bar of soap, he grabbed the shampoo bottle and squeezed the contents all over, lathering up and rinsing. His hands lingered over the chest and his cock, but he desisted.
After using several towels to dry off, he went to the bedroom and gazed in admiration of how the full-length mirror there showed him. Must be easily three hundred pounds, he thought to himself as he flexed. The fur did nothing to hide the build. In fact, it only added to show how huge he was. Too big for all of his clothes, he was sure.
He scoured the closets and drawers for something to wear and found a loose pair of shorts and a ratty tank top. Unfortunately, no underwear. He snorted at that. He could go out naked, he thought to himself eyeing himself again in the mirror. He flexed an arm. Let the world see this amazing hunk of beef with this amazing cock...
Without thinking, a hand started to fondle said cock, once again causing a wave of pleasure splash itself in his mind. The other hand went to the ballsack, gently squeezing those heavy balls, feeling them churn as they made another load of juice, then edging back to play with his rump and its tight pucker again.
“Fuck,” he moaned out, needing this so badly. A part of him worried that this constant need for sex was a side-effect, but the rest of him was enjoying the feel of his fingers in him, enough to blast out another heavy load on the mirror and the carpet.
Greg walked into the doctor’s office to find the doctor sitting where the nurse was the previous day. He was speaking on the phone.
“...I do not know what is going on,” Greg overheard as he walked to the desk. “The compound is not supposed to work this way...Yes, I know, but I don’t know....” The doctor trailed off as he saw Greg only in a pair of skin-tight shorts. “We have another one. I’ll call you back.” He hung up the phone and eyed Greg up and down. “And who might you be?”
“Greg Owst,” Greg said. “I have an appointment in a few minutes.”
“Ah yes,” the doctor said, picking up a clipboard and making a notation on the paperwork there. “You have your notepad? Ah good,” he added as it was handed over. He cleared his throat. “We will begin the, erm, second injection in a moment.” He flipped the pages. “Hm. Yes. Just as before.”
“Before?” Greg asked.
“We have had a few like you change into what you are now,” the doctor said, putting down the notepad. “To, erm, protect the confidentiality of the testers, I am doing this personally.” He stood up.
“Now, if you can go to the room on your left,” he continued, waving to the hallway, “feel free to make yourself comfortable.”
As Greg walked down the corridor, he could swear he heard loud growls and yelling, the noises causing his cock to swell. When he opened the waiting area door, he found out why.
The room was filled with burly tiger men, just like him, in all acts of fornication. Cocks were slamming deeply into eager mouths and asses, several sometimes in the same holes. Fountains of cum splashing against thick fur-covered muscle. Deep groans of pleasure filled the room.
“Hey guys,” one said, eyeing Greg, “we got a new one.” He pulled out of the hole he was plowing, and walked over. He was bigger than Greg was and lightly furred. “Pleased to meet you.” Before Greg could respond, he was kissed deeply. Greg melted in the other stud’s embrace.
“Fuck,” Greg said when they separated.
“Never thought you’d ask,” the other said, smirking. He dug into Greg’s shorts and gave his cock a solid stroke.
The other chuckled and bent down, pulling Greg’s shorts down to the floor. “Damn, that’s a thick cock,” he said, nuzzling it and licking it for a few minutes before swallowing almost all of it down his throat.
Greg shuddered deeply, his balls immediately shooting their load down the other guy’s throat. He then felt a hand feeling his rump.
“I bet you never been fucked by one of these cocks,” a deep voice growled. Greg felt fingers probe his tightness, making him to bend over for further entry.
“Yeah,” the voice said. “That’s what I’m talking about.” Greg groaned when he felt the fingers removed, but he groaned louder when he felt something much bigger shove its way into him.
“So you are saying that the compound was not supposed to be tested yet?” the doctor asked to the newcomer.
“I am very sorry,” the lady said. She was dressed primly in starched white. “As much as it pains me to say this, this was a mix-up on our end. Human error indeed caused this to happen, and we can only manage to control it as much as we could.”
The doctor looked down at the clipboard. “Ten people were supposed to be given the compound, and we got ten in the back room.” He paused as they heard a loud moan echoing down the hallway. “It’s the same symptoms: abnormal growth of hair, muscle, and male organs, with an increased sexual drive. Also, a few mentioned on how they were suddenly fascinated with males, when they were originally straight.” He put the clipboard down and shook his head. “What now?”
“Damage control,” the lady said. “We could put them in our facilities for further study, perhaps find a cure.”
The doctor shrugged. “It might work. But part of me is curious about this. Call it a doctor’s interest.”
Another shrug. “Just about the hows and whys, that’s all.”
“We’re still looking into that. Oddly enough, I have to say that your office is the only one that has this happening.”
“Human error again?”
“I would say so.” They rose from their seats. “I need to notify my supervisors about this. I will call back in an hour or so to inform you what our next step is.”
After he escorted her to the door, he turned around to find one of the patients coming out of the hallway.
“We are trying to find a solution to your problem,” the doctor said. “Please return to the room.”
“Problem?” the man said. He was heavily furred, a magnificent pelt of white and black, and heavily built. His cock was arching past his navel—almost touching the lower chest—and drooling. “What problem, doc? I mean, look at me, dude.” He flexed hugely in a double-bi pose. “So fuckin’ huge, dude.”
“Please return to the room, sir.” The doctor stepped close to escort the man-beast back, but was arrested by a rich scent of cinnamon and cloves. “What is that?” He involuntarily breathed deeper.
“This,” the man said, and he grabbed the doctor by the collar and pressed him against his armpit.
The doctor moaned deeply, suddenly lost in a lustful haze. He started to nuzzle the thick muscle, taking deep breaths of the scent.
“Heh, looks like you’re getting into it, doc! Here.” He shoved the doctor to his thick cock, forcing the head into his questing mouth. “Take it all, dude!”
The doctor didn’t know what was going on until he heard a deep growl, and his mouth overflowing with thick goo. He instinctively swallowed a few mouthfuls before pulling back and letting the rest streak his face and hair. He panted heavily, feeling a sleepy feeling suddenly overtook him.
“Wha—” he started before his eyelids fluttered, and he fell to the floor fast asleep.