Three Strings Walk Into a Bar...

Three pieces of string walk into a bar and the bartender looks at them suspiciously. He says "Sorry, boys, we don't serve strings here." So the pieces of string walk outside again.

They're sitting on the curb outside and feeling really thirsty when one piece of string says "Hey! I've got an idea to get me into the bar."

So he starts twisting and turning until he finally ties himself into a knot as a disguise. One of the other strings sees this and decides he will fray his ends as a different disguise.

The two pieces of string walk back into the bar. The bartender looks at them a little suspiciously again and says in a stern voice "Sorry, we still don't serve strings here!"

So the strings go back outside and tell the third piece of how they had failed. The third string then decides he will tie himself in a knot, and also fray his ends.

The third string walks into the bar and the bartender looks at him and says "HEY, are you a bit of string?!"

The piece of string replies "No, I'm a frayed knot"