Making Persons

Lately the Tiger keeps asking me: "Mama, how do persons make persons?" This tends to come up first thing in the morning, before I've had any coffee. I've given a basic and (I hope) age-appropriate explanation, but the question keeps popping up.

Maybe he's caught a clue. Today he drew this on the sidewalk ...


... and I'd like to know what that is if not a supersized cartoon sperm with a misshapen, club-footed tail, looking over his nonexistent shoulder to see if the other sperm are about to pass him up.