How Does the Baby Get in the Belly part 2

Our conversation this morning:

Curtis: Mom, why won't I ever get big boobies?
Me: Only girls get big boobies. The purpose of boobies is to feed babies milk.
Curtis: Well, why can't boys feed babies?
Me: I don't know. The same reason why mommies are the ones who carry the baby in their belly.
Curtis: How does the baby get in the belly?

* I stepped right into that one, didn't I? *

Curtis thought about it before I had a chance to answer and came up with this: Oh, I know!! When Jesus is making you, he puts the baby in the belly before he puts the belly on!!!