While Jeff was at school, his dad arrived home earlier than usual because his computer stopped working and he decided to borrow Jeff's laptop until his was fixed.
Mike went into his son's bedroom and grabbed the laptop from the desk, he was surpridsed it was on and with a strange program runnning, it had 2 pictures on the screen, eahc a naked version of both of his sons and a count down timer.
"what are you up to Jeff?" he whisered wondering why Jeff had those pictures on his computer, he tried to press every button but all the options in that program were locked, only one button was available and it said "add subject"
Unconsiously he clicked on it and inmediately a picture of himself appeared next to the ones of his sons, then his picture changed, and inmediately he felt a tingling sensation on his legs, ass and dick.
Seconds later the sensation stopped and the picture of himself had now swapped legs with Jeff's picture. The tngling sensation and the fact that he felt his pants and shoes bigger, made him wonder if something had happened to him in real life.
Still in his son's bedroom, Mike removed his shoes to noticed his feet were actually smaller with pink hairless toes. Then he removed his pants without any difficulty, his legs were now short and skinny, his ass was smaller and his underwear was barely hanging in its place.
When he finally took them off, he was shoked to find a small 2" long circumcised dick surrounded by brown pubes.
He looked at himself in the mirror and his now hairy torso was now attached to a pair of legs skinny enough to belong to a teenager. For some reason the sight of his mismatched body made him horny and his 2" dick started to stiffen until it reached 3".
his new dick very sensitive and it inmediately made him even hornier when he touched it.
In no time Mike started to Jerk his new 3" cock and forgot he was in his son bedroom afer noticing how fast he recoverd after every orgasm. He had now the dick and hormones of a 15 year old.