One of the funniest cartoons I've ever seen was in the Chicago Reader many years ago. It went something like this.
A couple of young parents are looking in on the room where their evil baby is lying in the crib. The mom says to the dad, "Do you think he's really evil?"
The dad says, "He's pretty evil."
"Do you think he's the devil?"
"I'll look behind his ear."
They both walk over to the crib and look down at the baby. The dad pulls his ear back slightly. He looks up at the mom and says,
"Well, they might be 9's . . ."