When DS was 2we were at a family reunion at a relatives house. They had a hot tub and he got out, took off his swimmer and loudly announced to my religious and private family "EVERYBODY PLAY NAKED!!!"
When he was 3 he asked my grandfather "Grandpa, do you have a penis or a vagina?"
A few weeks ago we were playing cars (he's 4 now) and his car was being mean to my car. So my car asked "why are you being so mean to me?" his car answered "BE-CAUSE! My mom didn't breastfeed me!"

I don't know where he got that, really I don't!