Zoo
Little Johnny is at the zoo on a school visit and he spots a deer.

Being a city kid he's never seen one before and so he asks his teacher, "What's that, Miss Jones?"

Miss Jones decides to play a word game with him and says, "That's what your Mom calls your Dad, Johnny."

Johnny thinks for a moment and then says, "I'm not stupid Miss Jones, I know that ain't a fuckin' pig!"