The scientist wandered out to the University Campus and across the road to the school. Outside the gates stood a teenager with a skateboard. A typical dropout, he stood sneering at passers by. The scientist estimated his age at 13 - a perfect test. The teenager stared at the scientist as he walked past, his head nodding to the sound of his walkman, his sneer open as he watched.
As he passed, the scientist dropped something from his pocket - a wallet. The teenager eyed it but said nothing, waiting for the scientist to walk around the corner before scooping it up. The scientist wandered back to his lab, eager to see if the drug would work.
The teenager furtively opened the wallet and took out the $50 and pocketed it. He also found an address inside and a tablet - large white and with "E" on it. The teenager grinned and popped it in his mouth. As he walked down the road he felt the familiar euphoria grip him and he smiled.
As he walked along he saw a group of bikers ahead of him leaning against their machines. Unusually, he took a long look at them, enjoying the way their tight leather showed off their muscles. One of them spotted him looking and laughed, pointing him out to his friends. They started to taunt him, daring him to come across. He moved on faster, blushing, wondering what the hell was wrong with him.
As he came up to an alley, he felt the first cramp in his stomach and he doubled up. Leaning against the wall he looked down as the pain spread across his body. His feet burned with pain as they split his expensive sneakers, his legs swelled and lengthened, first tightening his baggy trousers around them, then splitting them. His t-shirt stretched across his widening torso then ripped apart. Looking doen into a puddle he could see his face stretching and aging, his hair darkening and thickening, stubble growing across his lip and chin. In seconds, he had been transformed into a man.
Gasping with amazement he staggered backwards, a 6ft 4" muscled, hairy 28 year old. Looking down, he spotted his new manhood, long, thick and surrounded by a bush of hair. Stroking it experimentally, he loved the way it swelled and grew.
"Well and who are you?"
He spun around at the sound of the voice. It was one of the bikers - the biggest one. As he turned the biker looked down and grinned at what he saw. Trying to cover his nakedness, he tried to stammer an explanation, but his cock was rockhard in front of him and the sight of the approaching leather clad biker was just making it harder.
The biker grinned again. "No clothes? Well, as it happens, you look my size and I reckon I have just the sort of gear you need." As he approached, the smells of leather and musk assaulted the ex-teenager and he moaned with pleasure. Eyes closed, beofre he knew it he felt the bikers mouth on his own and his cock crushed between them in a string bearhug. He grunted at his own lack of control as his cock spurted into life. Looking down the biker frowned - "You'd better clean that off". Watching the muscled giant as he obediently knelt, the biker thought he'd better report back to the scientist - the test had worked even better than expected.