A piece of string walks in to a bar. The bouncer at the door looks at the piece of string and says “I’m sorry we don’t serve string here. You’ll have to go somewhere else.”
The piece of string is quite disappointed, and walks off round the corner. Not to be deterred, it ruffles its ends and ties a knot in its middle.
Walking in to the bar again the bouncer eyes it suspiciously and asks “Are you that piece of string I saw earlier?”
To which it replies “I’m a frayed not”.