When our daughter was five years old we were living in an apartment with only one bathroom. One day as I was finishing my bath she had to go potty - now!
As I was toweling off she sat on the potty and I could tell that she was trying to figure out something.
Finally she asked me that fateful question: "Daddy, mommies and daddies are different, aren't they?"
I decided to handle it in a straightforward manner and answered, "Yes Joy, they are." She got a really proud expression and boasted, "I knew that already cause mommies shave their legs and daddies shave their faces".