What Have Mom and Dad Been Telling You, Anyway?

Girl, watching painting: That's a girl, she's got those things. (points to nipples)
Boy: It's a boy! Grown-up boys have those, too. I've seen them.
Girl: It's a girl!
Boy: No, boys have them too; they just don't do as much. The girls' milk, the boys' don't.

Art Gallery
Portland, Oregon