A three year old boy is sitting on the toilet. His mom thinks he has been there too long, so she goes in to see what's up. The boy is sitting on the toilet reading a book. But about 10 seconds or so, he puts the book down, grips onto the toilet seat with his left hand and hits himself on top of the head with his right hand.
Witch Mom: Billly, are you all right? You've been there for a while....
Billy says: I'm fine, Mommy. I just haven't gone doody yet.
Mommy: Ok, you can stay there for a few more minutes. But, why are you hitting yourself on the head?
Billy says: Works for ketchup.