A young Irishman goes out to the local pub to have a drink one evening. Just as he's started on his first pint, and older man approaches him. The older man claps the young man on the shoulder and declares in a loud voice, "I f***** your mother last night, and she sure was fine!"
The barkeeper and the nearby patrons draw back in expectation that this brawny young man will defend his mother's honor, but he merely grasps the older man by the shoulders, turns him around and gives him a gentle push back the way he came.
After about 20 minutes, the older man returns and the scenario repeats itself. The other patrons of the bar are looking at the young man quizzically, as if trying to figure out if he was gay, a sissy or something else.
Some more time goes by and the older man again comes over, stating at the top of lungs, "I p***** your mother last night and made her squeal. Gonna do it again tonight!"
The young man's face becomes set in a grim expression, and the onlooker expect that he has finally worked himself up to behave like a man.
He puts down his drink, stands up and strides firmly over to the older man. He looks older man dead in the eye and, "Dad, go home, your drunk."
