The one I've always loved was attributed to Winston Churchill.

He (supposedly) used to tell a story of how during the darkest times of the London Blitz the BBC decided to have a limerick competition. Thousands of limericks came in from all over the British Empire and finally the funniest one was chosen. Because of the language of the limerick the most objectionable words had to be "beeped" out - leaving only those acceptable for most listeners. It was finally read on the air:

beep beep beep beep beep beep beep beep,

beep beep beep beep beep beep beep beep,

beep beep beep beep beep,

beep beep beep beep beep,

beep beep beep beep beep f*cking c*nt.

pax yall