A young man is quietly drinking in a pub when a drunk staggers in, points at him and shouts: “Your mother is the best lover I’ve ever had!” Everyone in the pub stops and looks over at the pair, expecting a fight to break out.
But the young man just ignores the slurs, so the drunk wanders off and bellies up to the bar at the far end of the pub. Ten minutes later, the drunk comes back, points at the man, and says: “Your mum and I had a fun time, and it was sw-e-et!”
Again the man refuses to take the bait, so the drunk goes back to the far end of the bar. Another round later the drunkard returns and yells: “Your mum loved it!”
Finally the young man can’t take it any longer, he sets down his pint, stands up in the old man’s face and yells: “Go home, dad, you’re drunk!”