A piece of string

A piece of string walks into a bar. He hops up onto a stool and yells to the bartender, "Hey! Gimme a drink!"
The bartender picks up the string and throws it into the street saying "we don't serve string in here, clear off!"
The string thinks, "I'll show 'im." So the string contorts its body into a whole different shape, and frizzes its hair ala a'fro. It goes back in, hops onto the stool and asks for a drink.
The bartender says, "Are you a piece of string"

The string answers, "No. I'm a frayed knot."