A rancher had a prize that stopped performing. The rancher when to a local veterinarian, who prescribed medication for the rancher to administer to the bull. (This was way before the existence of the "little blue pill".) The results were astonishing: the bull pursued every receptive cow he could find.

The rancher was at the feed store one day and ran into a friend. "Say, Willie, I've got a bull that can't... uhmm... er..." The friend stammered on, "Didn't your veterinarian give you something to help one of yours? What was it?"

Willie tried to describe the pills, but could not remember the brand. "Can you remember anything at all about those pills?" his friend asked.

"Nope," replied Willie, "but they sure did taste like chocolate..."