Sophie: Mama, you know how girls can drive straight with their knees, and no hands?
Sophie: Can boys do that?
Me: Yes. Girls and boys can pretty much do all the same things.
Sophie: Except girls are tougher than boys.
Me: Yes. Yes they are.
Sophie: There are just three things that make girls and boys different.
Me: Oh yeah, what are they?
Sophie: One, girls are tougher than boys. Second, their privates are different. And third, one is a girl and the other is a boy. See, three things.
Me: Yes, exactly right.