A piece of string walks into a bar.

Before he sits down the bartender yells “Hey! We don’t serve pieces of string like you!” The piece of string goes outside, ties himself in a bow, and rolls round on the ground for a bit.

Then he gets up, goes back into the bar, and sits down. The bartender says “Aren’t you that piece of string?” The string replies “No. I’m a frayed knot.”