I'll think I'll add another one - I'm enjoy (most of) these (I'm the 'guest' of the second entry).

A priest and a rabbi are on a long train journey and being roughly in the same line of business, become friendly with each other and spend the hours chatting.

A few minutes before the train is due to arrive the priest leans forward and says to the Rabbi "We've become friends - would you mind if I asked you - have you ever eaten any bacon?"

The rabbi blanches a bit and finally says "Ok, I have to admit, in my younger days I was a bit of a rebel, and I once tried some bacon".

The priest nods, satisfied, and says "Good, wasn't it?"

The Rabbi smiles sadly and says "Yes, I admit it was very good. But tell me! I've been honest with you, after all. Did you ever sleep with a woman?"

The Priest looks pretty worried by finally confesses that in his wilder days, yes, had slept with a woman.

The Rabbi nods. "Nu? Better than eating bacon, isn't it?"

If this thread keeps going, maybe I'll remember a few more.