Aizawa walked into the class

Aizawa: “Hello problem children.. I have a more… different lesson for you guys. And it doesn’t really include the girls.

Momo: “It’s only for the boys?”

Aizawa: “Correct.”

Mina: “what is it..?”

Aizawa: “I thought it would be a good idea to have all the boys try out a period cramp simulator, since they all claimed that getting kicked in the balls probably hurts more than period cramps.” He held up the period cramp simulator

All the girls: “Dammmmnnnn…-“

All the guys: “WHAT?!”

Aizawa: “Are any girls on their period right now?”