I love listening to my girls talk to each other and play. It's quite interesting sometimes. The other day I heard this:
Natalie: "Gabbie, do you know the difference between boys and girls?"
Gabbie: "Girls have long hair, and boys have short hair"
N: "No, Boys are stinky and girls have boobs!"
She was as serious as she could be. And for the record, I don't plan to tell her any differently any time soon. ;o)