Johnny calls to see his mate Paddy, who has a broken leg.
“Me feet are freezing mate, could you nip upstairs and get me slippers?”
“No, bother,” he says, and he runs upstairs and there are paddy’s two stunning 19-year-old twin daughters sitting on their beds.
“Hello dere girls, your Da’ sent me up here to shag ya both.”
“Fook off you liar!”
“I’ll prove it,” Johnny says.
So he shouts down the stairs,
“Both of them, paddy?”
“Of course, what’s the use of fookin’ one?”