Calvin asks Dad why his eyes close when he sneezes. Dad says if his eyelids weren't closed, the explosion would blow his eyeballs out. His eyes would flop around and he'd have to point them with his hands to see anything. Calvin asks why Dad knows so much. Dad says it's all in the book you get when you become a father.

Calvin asks if there is a book you get when you're a father that explains everything in the world. Dad says yes but won't show it to Calvin when he asks. Dad won't show it because it tells what it's like to raise a kid. Calvin asks what's wrong with that. Dad tells him he's not allowed to know that until it's too late not to have one.