A dirty joke from the 1400s...
In Florence, a young woman, somewhat of a simpleton, was on the point of delivering a baby. She had long been enduring acute pain, and the midwife, candle in hand, inspected her secret area, in order to ascertain if the child was coming. “Look also on the other side,” said the poor creature, “my husband has sometimes taken that road.”
From “The Facetiae Or Jocose Tales of Poggio”, a joke book published in the 1400’s by Poggio Bracciolini