A nun gets on a bus that’s empty except for the driver.
She says “I’m going to die soon but I want to have sex before I die. Problem is I must remain a virgin so it has to be in the ass. I can’t commit adultery, so the man must be single. Can you fulfill my wish?”
“Yes” says the bus driver and fulfills her wish.
Feeling guilty he says “I’m sorry I lied, I’m married with 3 kids. “
“That’s ok” replied the nun “I lied too. “
“My name is Kevin and I’m going to a fancy dress party. “
This joke is included in the Black Book of Jokes. You can order it from here.