The Potty
A three-year-old boy is sitting on the toilet. His mother thinks he has been in there too long so she goes in to see what's up. The child is sitting on the toilet reading a book. But every 10 seconds or so he puts the book down, grips the toilet seat with his left and and hits himself on the top of the head with his right hand.
His mother says, "Billy, are you all right? You've been in there for a long time."
Billy replies, "I'm fine, Mommy. I just haven't gone yet."
Mother says, "Okay. You can stay here a few minutes. But Billy, why are you hitting yourself on the head?"
BILLY SAYS: "WORKS FOR KETCHUP."