Good morning

Three guys are sitting in a bar when another man comes in and start drinking. After a while, he approaches the guys, and, pointing at the one in the middle, shouts, ‘I fucked your mother!’. Then he goes off to get another drink.
Ten minutes later he comes back, points at the same guy, and says, ‘Your mom gave me oral sex!’ . Then he staggers back to order one more.
Fifteen minutes later, he gets right up in the same guy's face and yells, ‘I've had your mom bent over the kitchen sink!’. At this point, they've had enough.
The middle guy pushes the old man toward the door and shouts, ‘Look, Dad, your'e drunk, go home!’