Dustin saw a boy talking on the phone over in the corner of the arcade. He looked about 12 years old, and was wearing basketball shorts and a T-shirt. He was also sitting with his legs spread wide, giving Dustin a perfect view of his cock and balls. Dustin focused in on his genitals. Immediately the boy stopped talking and groaned slightly, before carrying on. His four inch cock began to lengthen, coiling up inside his loose boxers. The boy's small balls also began to pump up.
As his cock passed 5 inches, the boxers began to deform as the boy's increasingly bigger penis pushed for more room inside. A small bulge, barely noticeable at first, formed between the boy's legs. Dustin continued to stare, enjoying watching the real show going on inside the boy's boxers as his cock continued to grow.
6 inches. The boy's cock began to become thicker as well as longer. The growth began to speed up, picking up speed as the boy's balls began to suddenly produce new testosterone, kickstarting the boy's puberty. His balls descended and grew faster, becoming the size of large grapes. As they grew, they pushed the boy's blooming cock outwards further. Meanwhile, Dustin could see that the boy now had a small, but visible cock outline in his shorts. Dustin grinned, he wanted to make that bigger.
7 inches. The boy was now the proud owner of an above-average cock, and it showed - literally. The bulge on the outside grew in leaps and bounds, becoming more noticeable and certainly more recognizable. Dustin realized that while it was fun to grow this boy's cock, he needed to stop soon before it got out of hand. But he let it go on a little longer. The boy's balls continued to grow. They were now the size of small eggs, and they were pushing the boy's plus-sized cock outwards even more. The bulge on the outside grew larger. Dustin continued to stare.
8 inches. The boy's cock was large and nearly every detail could be read through his shorts. Supported by his newly enlarged balls, the boy's cock pushed out of the material, creating a huge outline in the boy's shorts. Dustin knew he should stop staring and he really did want to, but he couldn't resist. One more inch...
9 inches. If the boy's cock was large before, it was huge now. Every detail, from the thick base of the boy's cock to the massive vein running down the middle to the mushroom-shaped head was extremely visible in the shorts, which had run out of room a long time ago. The boy's tennis-ball-sized balls were equally impressive, creating twin bulges that forced the boy to unconsciously spread his legs wider, though he didn't know it.
The boy unconsciously reached down to adjust himself into a more comfortable position. When he felt his cock, he froze. After looking down, his eyes bugged out and he ran off to the bathroom to check his new equipment out.