A piece of string goes into a bar and says to the bartender, “I’ll have a beer please”
The bartender says, “Sorry, we don’t serve pieces of string here. Now get out”
The piece of string goes outside, thinks for a minute. He then ties a knot in his middle, ruffles up both ends of himself and goes back in.
He says to the bartender, “I’ll have a beer please”
The bartender says, “You’re that piece of string that was in here before, aren’t you?”
The piece of string looks at him and says,
... I’m afraid not.