"Welcome to puberty day" grinned Mr. Henderson. He knew that the sex-suppressant drugs had already been eliminated from the students's diet, and combined with the almost immediate effects of hyper-testosterone, they would soon be feeling the extreme horniness of a male puberty.
Each student had been offered an opportunity to withdraw from the program before physical changes began. None had taken it. They were lined up, ready to receive their shots. Some like Jack, were chatting away (Jack had used a sharpie to write "Going out of business" on his breasts) while others, like Bill, were dry-mouthed with excitement and anticipation. The shots themselves were a bit anti-climactic, but everyone was still excited.
"Do you feel anything yet?" Bill asked Mike shortly after the shot. "I think my face is a little itchy."
"My crotch is itchier."
Bill blushed. "That too, I guess."
"C'mon" said Jack "Let's go hit the weight room."
Mr. Henderson smiled, remembering his own transitional puberty. The guys would work off some of their new energy in the weight room, but he was sure that that night everyone of them would be enjoying the quintessential pubescent male experience of jacking off, even without a penis. Each would find customized pornography on his personal digital unit (a distant descendant of the pre-catastrophe smartphone) that would reinforce his new male identity.