A string walks into a bar.

“Excuse me,” he asks “Can I please have a drink?”

“Nope” replies the bartender, “We don’t serve strings.”

Upset at the discrimination, the string asks a fellow at the bar to buy him a drink. Seeing this the bartender picks him up and throws him out of the bar.

The string walks over to a curb, rubs himself against it and ties himself in a knot, then walks back into the bar.

“Excuse me, can I please have a drink?”

“Aren’t you the string that was just here?” asks the bartender.

“No” came the answer, “I’m a frayed knot.”

Thanks Mike Adkinson