Susie comes over and asks if Calvin signed up to play baseball at recess. She says he must be the only one who didn't. The others are playing in the back fields. Calvin is the only boy on a playground full of girls. Susie says it looks that way. She asks if Calvin wants to teeter-totter with her. Calvin, shocked, says he's in Cootie Central and hasn't had his shots. Susie tells him stupidity produces antibodies. Calvin pulls his shirt over his mouth asking for an air filter.