Ty smiled wickedly, and said, "Let's have some more fun first, Dusty! We'll keep his cock and balls growing but keep his mass constant. The rest of him will shrink. It'll be a terrific test of love for his girlfriend. She might even wish her pussy could accommodate the giant prick."
"I don't think little men faired too well in the "Attack of The 50 Foot Woman."
"Point taken, Dustin, if she wishes that we shrink him down to dildo size. Hang conservation of mass."
By now the youth had lost a foot in height, though in his crouched position it wasn't obvious yet. He was groaning as his dick head touched the floor, and began to grind into the floor as it continued to grow. Now it was starting to get hard, and literally lifted his reduced frame off the the ground. A milky white liquid spread across the floor, at least a glass worth of precum covered the floor. Bagged basketballs hung from his legs nearly a foot off the ground. The bottom of his scrotum touched the tops of his feet, and his sandals fell off as his feet shrank out of the straps.
Dustin looked scared, Ty smiled.
"Don't worry I made it so no one else in the store will notice those two or us."