At least it's not a knock-knock joke

[DaveB]

A gag about a woman breaking wind has been unveiled as the world's oldest witticism in a new research project released today.

[Spacecadet]

Augustus was touring his Empire and noticed a man in the crowd who bore a striking resemblance to himself. Intrigued he asked: "Was your mother at one time in service at the Palace?" "No your Highness," he replied, "but my father was."

brilliant

[TimberWolf]

I'd be interested to know when the question "does my bum look big in this?" was first made.