A piece of string walks into a bar ...
The little piece of string walks up to the bar, sits down and demands a drink.
"Bartender! Give me a beer!"
The bartender looks the piece of string up and down and says, "We don't serve your kind here."
The piece of string lowers his head, slumps down from the bar stool and walks out of the bar onto the busy city streets.
After a couple of minutes, the piece of string summons up the courage to go back into the bar. String walks through the door, up to the bar and sits back down on a stool. String states firmly, "Bartender! Get me a beer!"
The bartender looks over the piece of string and says, "Look, man, I told you ... we don't serve your kind here. Get outta here!"
The piece of string slumps off of his bar stool for a second time and slowly swaggers out of the bar.
Once outside, String leans against the wall in humiliation. All of a sudden he has an idea ...
The little piece of string ties himself into a knot and messes up his hair. String marches straight back into the bar, slamming open the door and taking his seat on the throne.
"Bartender!" yells String, "Get me a beer!"
The bartender casually looks over the little piece of string, frowns and then says, "Hey! Aren't you that same piece of string that's been in here before?"
The little piece of string looks the bartender square in the face and says ...
"Nope. I'm a frayed knot!"