The world's oldest recorded joke has been traced back to 1900 BC and it appears that toilet humor was popular with the ancients just like it is today. The Sumerian saying goes like this, "Something which has never occurred since time immemorial; a young woman did not fart in her husband's lap." The people who brought you written language and the wheel also brought you the fart joke. Dr Paul McDonald, senior lecturer at the University of Wolverhampton said, "Jokes have varied over the years, with some taking the question and answer format while others are witty proverbs or riddles. What they all share however, is a willingness to deal with taboos and a degree of rebellion. Modern puns, Essex girl jokes and toilet humor can all be traced back to the very earliest jokes identified in this research."