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.