Ty realized that if he had undergone puberty, he must have had some changes down below. He tore of his stretched pants easily, and gasped. His once 3in soft dick was now a mammoth. It was a thick 8in, completely soft.
"I have a big dick..." he said aloud, amazed. At the word big, his cock twitched to life. It began to grow up, up, up, until finally, it stood fully erect at 13in.
"I have a big dick..." Ty repeated. His hand slowly moved up and encircled his manhood, and he began to pump up and down rhythmically. As his excitement heightened, so did his pace. "I...uh...have...oh...a big...ugnh...dick" Ty said yet again. All thoughts were fading from his mind except the need to please his huge dick, and to make it get even bigger...
Ty could feel himself approaching climax, and as he did, he felt something else. His already massive penis began to further lengthen, stretching to 14...15...16 inches long. "Oh yeah..." Ty moaned, "get...bigger...UGHH." As Ty's cock erupted with cum, it also shot up to 20inches long with the first shot. The second shot brought it to 24. Ty's height had also slowly been increasing, though not nearly as quickly as his cock grew. 8 massive shots later, Ty's penis was a full 3 feet long, and as thick as a normal forearm.
After his orgasm, Ty's long rod did not flag at all, it was still hard, and he was still horny.