Jenny finds a cute monkey in the zoo and throws some peanuts at it. However, every time the monkey picks it up, sticks straight into its ass, takes it out and then puts it into its mouth.
Jenny is very puzzled so she asks the attendant nearby. The attendant says, "Last year someone gave the monkey a big pear. After eating it, the monkey could not poo poo for several days. Ever since then, this monkey won't eat anything without measuring it first."