Murphy was walking down the road towards Mulligan’s bar, when he was accosted by a nun who was standing on the step outside the bar.
As Murphy was about to walk into the bar, Sister Marie called out to him: “Surely a fine man like yourself is not going into this den of iniquity? Surely you’re not going to waste your hard-earned cash on the devil’s brew. Why don’t you go home and feed and clothe your wife and children instead?”
“Hang on Sister”, spluttered Murphy. “How can you condemn alcohol out of hand? Surely it’s wrong to form such a rash judgement when you’ve never tasted the stuff?”
“Very well”, said Sister Marie. “I will taste it just to prove my point. Obviously I can’t go into the pub, so why don’t you bring me some gin. Oh, and just to camouflage my intent, maybe you should bring it out in a cup not a glass!”
“OK”, said Murphy and into the bar he breezed.
“I’ll have a large gin”, he said to the barman, “and can you put it in a cup?”
“My God”, said the barman, “that nun’s not outside again is she?”
Image used under a Collective Commons License from https://en.wikipedia.org/wiki/Holy_water