A nun went to the pub and ordered a gin. The bartender said to her, "I thought nuns weren’t allowed to drink?" and she said, "Not usually, but I am doing the bishop a favor."
The bartender then asked if she was coming to the music evening, and she said, "No, I am with the bishop tonight."
Listen up, smarty pants. The joke is that the nun is doing "favors" for the bishop, which implies something naughty is going on between them! It's funny because nuns are supposed to be holy and pure, not sneaking around with the bishop. By the way, did you know that some people think being a smarty pants is a sign of overconfidence, which can actually make you less likable? Just sayin'.
