Johnny was excited, the schools prom was next week and he was getting ready to ask Sherri if she would go to the prom with him. Gym class was the only class that they had together, so he had to be as confident as he could, this could be his only chance. Sherri meanwhile, had been waiting for Johnny to ask her to the dance, much like a typical teen-drama, both were nervous, but they'd loose plenty in a few minutes.
As Johnny worked up his nerve, he felt a little weird, why was he trying to hang out with a girl? Didn't they have cooties and chase boys? No. He liked Sherri. But he was a boy, and boys played with boys. He turned around and went to hang out with his buddies, who were all gathered in a circle for some reason.
When he got there, he saw that Timmy had his pee-per out, as did the rest if the group. They were showing them off! Johnny giggled madly and pulled down the front if his pants to reveal his flaccid pee-pee. All the guys then got an idea, and after talking it over, decided to get all the guys in on it. They dispersed and began to get the other guys to join them.
Sherri meanwhile was talking with her friends about my little pony, and how great it was, and talking about how "big" the girls were up top. Which was something that they (mentally) didn't know about. Then, Johnny and his buddies jumped into the group, butt naked. No shirt, no shoes, no pants, nothing. Some twenty guys naked and laughing at girls and how they didn't have pee-pees like them.
All Sherri did was scream and run like her friends, who thought the boys were being gross. When the boys decided to have a wrestling match, the girls stayed over on the far side of the gym discussing how to get revenge.