Three guys walk into a bar and sit down.
There's a drunk at the end of the bar who walks up to the guy in the middle and says "your mom is the best lay in town!!"
The guy ignores him and the drunk goes back and sits down.
About five minutes later, he gets up and walks over to the same guy and says "your mom gives the best head in town!!"
Again, not wanting to beat up a drunk, the guy ignores him. The drunk goes back to his stool and sits down.
About five minutes later, the drunk gets up again and says to the same guy "your mom is a slut!!".
Finally, unable to ignore the drunk any more... the guy turns to him and says "you're drunk, dad, go home!"