Flatulence joke is world's oldest :

Breaking news about breaking wind: the world's oldest joke is a one-liner about flatulence, researchers say.
Academics have compiled a list of the most ancient gags and the oldest, harking back to 1900BC, is a Sumerian proverb from what is now southern Iraq.
"Something which has never occurred since time immemorial; a young woman did not fart in her husband's lap," goes the joke.
Randy pharaohs, thirsty ox-drivers and barbers also feature in the list.
The oldest British joke dates back to the 10th Century, and uses the traditional question and answer format to suggestively poke fun at Anglo-Saxon men.
"What hangs at a man's thigh and wants to poke the hole that it's often poked before? A key."