An aged farmer and his wife were leaning against the edge of their pig pen when the old woman wistfully recalled that the next week would mark their golden wedding anniversary.

"Let's have a party, Homer," she suggested. "Let's kill a pig."

The farmer scratched his grizzled head. "Gee, Ethel," he finally answered, "I don't see why the pig should take the blame for something that happened fifty years ago."