How bad are the old saws? Well ...
The first joke comes from ancient Sumeria circa 1900 BC:
Something which has never occurred since time immemorial; a young woman did not fart in her husband's lap.I'm sure you could come up with a slight rewording that you heard before you completed high school. Proves that really bad humor has been with us a long time.
Leaving aside some Pharaoh and nearly nude nubile women jokes from the 1600 BC era, you might wonder about the jokes of relatively modern ancient cultures. Well, the Anglo-Saxon's from the 10th century left behind this bawdy question and answer joke:
Question - What hangs at a man's thigh and wants to poke the hole that it's often poked before?Answer - A key.I think I heard that one before I was out of grade school. How about you?