Interesting Fact # 849 - Britain's oldest joke

The oldest British joke is a bawdy gag from the 10th century which employs the traditional question and answer format.

"What hangs at a man's thigh and wants to poke the hole that it's often poked before? A key."

(Wow! Where did we get a reputation for having a good sense of humour from? I guess it's marginally funnier than the world's oldest joke.)