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 big party, Homer,"" she suggested. ""You'll need to 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.""