In the age bar, Matt chose 18. He pressed "Enter" and waited for the changes to begin.
The first thing he noticed was that his clothes were starting to get tighter. Then, he saw a bulge starting to appear in the front of his pants with some pubic hair coming out.
Suddenly. Matt began to shoot up. Hair began to appear on his legs and arms. His voice cracked and deepened as he moaned. He quickly out grew his pants and socks, leaving him only in his tight boxers and revealing top.
The height growth slowed down, only to be replaced with muscle growth. His legs started to take shape as the hair on them thickened. The same thing happened to his arms. Then, his flat stomach began to harden as abs began to appear. His pecs did the finishing blow to his shirt as they quickly expanded. Stubble started appearing as his faced matured, growing wider. The final changed was visible as Matt's boxers ripped, showing off his newly-grown package, surrounded by a nice patch of hair.
Matt stopped to think. The machine was amazing! He started to come up with something else to do...