Calvin and Hobbes are wearing paper hats. Susie Derkins comes along and asks if she can make one, too. Calvin tells her these are the official hats of the G.R.O.S.S. club. Susie asks about the "slimy girls" part. Calvin says he knows it's redundant, but otherwise it didn't spell anything. Susie yells that girls aren't slimy. Calvin tells her not to get gunk on him. He took a bath last Saturday, and he's all clean.