Justin may have only been 18, but he was only 6 foot and was very thin, he only weighed about 132 pounds. Ben was incapacitated from the energy required for the changes, so he was unable to do anything, in this time, Justin decided it would be a good idea to make some changes on himself.
Justin entered specific values into the website for each of his body parts. The fields were;
Traps
Delts
Biceps
Forearms
Pecs
Abs
Lats
Quads
Thighs
Penis
Balls
But then, just before he hit enter, he accidently hit the x10 button, and it began...
Immediately, he felt changes happening in his body, he fell to the ground due to the sensation, he nudged himself over to the mirror to watch himself grow. First, it started with his Traps and Delts, they inflated as if they were filled with a whole bag of tennis balls. Then it got to work on his biceps and forearms, his skin began stretching to make way for his muscles, just from under all the growth, he could see the veins popping out, becomming more noticable, pumping, throbbing and growing...
Then his Pecs and Abs began to grow, it felt his pecs were filled with watermellons and his abs were filled with rocks, his stomach became more defined and the cleavage between his pecs looked like a chasm. His lats were also tightening, his sides were becomming thinner, yet more defined at the same time. There was enormous bumps along the sides of his chest now.
Then his quads and thighs began to grow, his pants were stretching, getting tighter, and the sensation got even greater. Finally, it all stopped, or so he thought..
He got up to inspect his new body, he wipped off his shirt and began to stroke his godly chest, but then, he was thrown to the ground once more, He felt a sensation stronger than before, he couldn't take it! He was in such pain at the same time, he felt his pants tightening even more, it was clear now that his cock and balls were growing, he noticed an enormous buldge in his pants, and all of a sudden, the stitching started to come undone, there was too much pressure, and then his pants fell apart. That revealed his cock, it looked like a 18 inch snake had found it's way into his underpants, it looked as if his underpants couldn't take much more pressure, his cock kept growing, getting longer and thicker, he couldn't even fit both of his hands around it now, and then his underpants gave way. The enormous cock flew out onto the floor and Justin got a hard on, at the worst possible time...
His cock kept on growing and Ben was on the ground just infront of him, he hardly had the strength to shut his mouth.. The cock found it's way into Ben's mouth as it kept growing, then Justin's balls began to grow and he couldn't take it anymore, he shot off his whole load which was atleast 4 gallons, right into Ben's mouth. The cock had grown so much that it was too big to pull out of Ben's mouth. Ben had no option, he had to swallow..