Halloween joke

A cabbie picks up a nun in San Francisco. Getting into the cab, she notices that the very handsome cab driver won't stop staring at her. She asks him why he is staring.
He replies: "I have a question to ask, but I don't want to offend you."
She answers: "My son, you cannot offend me. When you're as old as I am and have been a nun as long as I have, you get a chance to see and hear just about everything. I'm sure that there's nothing you could say or ask that I would find offensive."
He shrugs: "Well, I've always had a fantasy to have a nun kiss me."
She responds: "Well, let's see what we can do about that. Number one, you have to be single, and number two, you must be Catholic."
The cab driver is very excited: "Yes, I'm single and Catholic!"
"Okay," the nun says. "Pull into the next alley." The nun fulfills his fantasy with a kiss that would make a hooker blush but, when they get back on the road, the cab driver starts crying.
"My dear child," said the nun, "Why are you crying?"
"Forgive me, but I lied and I must confess: I'm married and I'm Jewish."
The nun says "That's okay. My name is Kevin and I'm going to a Halloween party."