From Edel:
A cabbie  picks up a Nun.
She gets into  the cab, and 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 you 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.’
‘Well, I’ve always had a fantasy to  have sex with a nun.’
She responds, ‘Well, let’s see what we can do about that:
#1, You have to be single
#2, You must be Catholic.
#3, I have to save my virginity, you will have to enter me from behind.
The cab driver is very excited and  says, ‘Yes, I’m single,  Catholic, and I’m happy to enter from behind!’
‘OK’  the  nun says. ‘Pull into the next alley.’
The nun fulfills his  fantasy, in a way that would make a hooker blush.
But when they  get back on the road, the cab driver starts  crying.
‘My dear  child,’ says the nun, ‘why are you crying?’
‘Forgive me but  I’ve sinned.  I lied and I must confess, I’m married and I’m  Jewish..’