"Well," says the bus driver, "every night at 8 o'clock, she goes to the cemetery to pray. If you dress up as God, I'm sure you could convince her to have sex with you."
The man decides to try it, and dresses up in his best God costume. At eight, he sees the nun and appears before her.
"Oh, God!" she exclaims. "Take me with you!" The man tells the nun that she must first have s*x with him to prove her loyalty. The nun says yes, but tells him she prefers an*l s*x. Before you know it, they're getting down to it, having nasty, grunty, loud s*x. After it's over, the man pulls off his God disguise.
"Ha, ha! I'm the man from the bus!"
"Ha, ha!" says the nun, removing her costume. "I'm the bus driver!"