Richard Scarry book: "You can be a doctor or nurse."
Pete: I can't be a nurse. You have to be a woman to be a nurse.
Erik: Well, some men are nurses. Men and women can be doctors, and men and women can be nurses.
Pete: (skeptical look)
Erik: It's true that most nurses are women, but some are men, too.
Pete: Actually, I have secret books. And I was reading them, and one of them said only women can be nurses.
Erik: . . .
Pete: These books are real! And they can tell you about anything!