A string

One day a string was walking down the street.
He was really thirsty and decided to get a drink at a nearby bar.

So he walks up to the bar tender and says, "I'd like a beer, please."

The bartender looks at him like he's crazy and says, "I can't serve you, you're a string.

Go on. Get out of here." So the string goes outside and thinks of a way to look more like a person.

He knots himself toward the top and frays the string to look like a head with hair.

He goes back inside and tries again.

The bartender says suspiciously, "Hey, aren't you the string that was just in here a few minutes ago?" The string replies, "I'm afraid not!" (I'm a frayed knot)