Ken was surprised to see his kid brother Tommy standing in the doorway wearing a lab coat and holding a clipboard.
"Ken? You're here to be a test subject?" Tommy asked doubtfully.
"Yeah. What can I say, I need some extra money, and there aren't a lot of other jobs out there. What about you? You a human guinea pig too?"
"Nope, I'm the guy who gets to play mad scientist with your body," he said with a laugh, "Just kidding, Ken. I'm a research fellow here."
"But you're only 19?"
"Yeah, big bro, but while you got the muscles, I got the brains. They pay for brains to do the experiment. They pay for muscle to be the experiment. Let's go back to an exam room, and we can talk in private, and I can take some measurements."
"Sure. No, problem with your bro being one of the test subjects."
"Nah. In fact you might even say it was a perk. I haven't seen you for a while, so we can catch up while I prod and poke you."
Ten minutes later, Ken was naked and bent over an exam table. He had wondered when his brother Tommy had pulled on the elbow length rubber gloves, now he understood. Ken had been a bit embarrassed to have his kid brother examine his prostate. Still he'd had doctors hands up his ass before. Each year for the team physical, and once for the exam for his job at the bank before he'd been laid off.
Each of those exams had involved a finger or two up his ass, but his brother was being a hell of a lot more thorough. All five fingers, then the whole hand up to the wrist, and then the forearm up to the elbow. Ken was in hell. Tears streamed down his cheeks, but he couldn't let his brother know. The worst part was when he popped a boner. It was trapped between his torso and the vinyl exam table top he was leaning across. Now Tommy was squeezing his prostate. It felt so good, but at the same time so weirdly awful. He felt his body jerk and could feel the wet puddle of cum forming on the table around his bare chest. He didn't know what to say, so he just lay there suppressing moans.
"Seems healthy, bro about the size of a big walnut. It feels uniform, no lumps. Now I'll be checking it daily to make sure it doesn't change, that's part of the experiment. Hope you don't mind, Ken."
"If everybody's getting theirs checked, I guess I can take it too. Don't want to get an enlarged prostate."
There was a knock at the door.
"Okay, Ken here's a cup for your urine sample, and a baggie for a stool sample. You can use this bed pan if you need it. I'll be right back."
Ken stared at the pink plastic bowl, clear plastic bottle and the plastic baggie with his name on it. He rolled his eyes, but did as instructed. Tommy had already upgraded him to a special study which would be paying him a couple thousand dollars, maybe more. It might be humiliating, but he knew he could trust Tommy's discretion, and he really needed the money.
"Tom, what the hell are you doing? I was watching through the one-way glass, and saw you giving the subject a prostate exam. Whatever did you do that for? That's not required for this experiment," the professor said.
"Dr. Winkler, it should be a good gauge for monitoring his changes. The size changes in it should be apparent long before the physical changes take effect."
"I notice that this subject is related to you. Will that be a problem?"
"No, sir, it's a perk. That's why I upgraded him to the level 10 experiment."
"Level 10? Well, that's good. Did he sign all the consents?"
"Every last one, and he didn't even read a word of them because he trusts me."
"Excellent. As long as they're all signed, I don't have any problem with him being a level 10 subject. You sure you don't have any problem with it?"
"With Ken? You were a nerd when you were in school, weren't you professor? I bet you felt so relieved to go home and be away from the jock bullies, didn't you?"
"Well, yes, but I don't see how that's relevant."
"Well, Ken's my older brother by 3 years, but I skipped to grades and he got held back one. So we were in the same grade throughout most of elementary and all through high school. He was my jock bully at school, and when I went home, he was there too. We shared a bedroom. Imagine being 24/7 with your jock bully, and then having him as a test subject."
"Yes, I understand," the professor said thoughtfully.
"Poor son of a bitch," muttered the professor as he walked away, and glanced at the copy of Ken's profile as a level ten test subject.
Tom re-entered the exam room carrying a metal box labeled "TEN". It contained everything he needed for the experiment, and more his revenge on Ken.
Ken was standing there with a full beaker of piss, and a baggie with a 12 inch turd sticking out of it. Tom rolled his eyes.
"I just need a sample, Ken, not a day's worth," laughed. "Now if you don't mind me handling your cock and balls, I need to measure your urethra." Tom pulled out a long thin metal wire. It was marked sort of like dipstick.
Ken had no idea what Tommy had in mind, but he trusted the guy. He knew Tommy knew that Ken could and would pummel him if anything wrong. So he said, "Sure. Do whatever you need to do, bro."
His fingernails dug into the vinyl exam table top as the long metal sound pushed through his piss slit and down the tube that let to his testicles. His cock was now rock hard in his kid brother's hands. His eyes watered. He tuned out almost everything his brother was saying. He need hear 200 mm given as the depth of the sounding.
Next he got three injections: one in his upper left arm, one in his thigh, and one in his buttock. He yawned. He felt really sleepy.
Another knock at the door, Tommy opened it and an orderly wheeled a gurney into the room. Tommy helped naked Ken on to the gurney with the orderly's help. Ken asked about his clothing, and Tommy told him he'd take care of everything. Ken yawned and fell asleep. Tommy started to strap Ken to the gurney.
"Shouldn't we put a sheet over him first?" asked the orderly in surprise.
"It's not like he'd notice. Now wheel the subject to room SB213 and strap him into bed. I'll be down to check on him in an hour or two."
"Yes sir."
As the door closed behind the orderly, Tommy sat down at the desk, and reviewed the chart he'd just completed carefully. He gathered the specimens that Ken had provided, and then added an eye dropper full of the cum lying on the exam table to a pipet tube. Then his grin widened as he reviewed his plans for Ken's tranformation.