"How about a pencil," thought Ty, eyeing Jason's dick.
Jason's cock gave a twitch and blood began to flow through it. To his embarrasment, he was getting a huge erection. It began to straighten out across the floor, before lifting up suddenly to stare right at Ty. Then with slight twiches it rose to stick straight up in front of Jason's face. Jason was terrified, but slightly fascinated.
"lick it" commanded Ty.
Jason tentatively stuck out his tongue and touched his frenulum. He shuddered. Then he reached out with his hands and wrapped them around his cock...they just barely touched. Then he slid his hands up along his shaft til they touched the edge of his cockhead.
His testicles grew to the size of bean bag chairs. They got bigger, so that his legs no longer touched the ground and he was actually sitting on them. He winced at the pain in his testes and the pleasure in his cock. Both continued to swell. Eventually he sat on his balls, hugging his cock, with his legs wrapped around the base, and his face pressed into the shaft.
"pencil time!" yelled Ty. He went up and rubbed the moaning Jason until he shot his load. In mid-spurt his cum turned into graphite. Starting with his cockhead, his penis gradually became wood. His balls started losing hair and turning into rubber while his body and limbs became metal. This strange form shrank and blended together until his shaft was a pencil's shaft, his body was the metal eraser holder, and his testicles were the eraser.
The new "pencil" lay on the floor. Ty walked over and picked it up...