Q: What's the difference between a nun and a woman in a bathtub?
A: One has hope in her soul and one has soap in her hole.
Q: What's the difference between a nun and a woman in a bathtub?
A: One has hope in her soul and one has soap in her hole.
The joke plays on the similar-sounding words "soul" and "soap" and the double meaning of "hole". It sets up a question about the difference between a nun and a woman in a bathtub, and then it uses a pun to create an unexpected and slightly vulgar answer.