A cannibal and his son are going to look for food. They hide behind some bushes and waited for someone to come by.

After a few minutes, a skinny man comes by. The son says "How about him, dad?"
"No," says the father, "he's too skinny."

A short time later, a fat man wanders by. "What about that guy, dad?" asks the son.
"Too much cholesterol."

A little later, a pretty, 20 year old lady walks by. The son asks, "Dad, how about her?"
The father replies "Yes! Let's take her home and eat your mother!"