Anatomy Confusion

Bay: "My mom's friend had her appendix out."
Me: "Oh yeah? She doing okay?"
Bay: "Yeah. She's feeling better. I told my friend that when you had your appendix out, you couldn't walk for a week!"
Me: "Uh...I've never had my appendix out. Dad did."
Bay: "Oh! Huh. I didn't even know boys had one! I thought it was just girls!"
Me: "No...everybody has one. I had my uterus taken out. Only girls have one of those."
Bay: "OOOOOOHHHHHHH! Duh!"

;)