The three strings.

There were once three strings who wanted to go for a drink, but the only bar in town had a big sign out front that read "No strings allowed!"

The first string said "Forget the rules!" and waltzed right through the front door. The bouncer immediately grabbed the string and tossed him back out the door.

The second string ,seeing his partner fail, kinda jumbled himself up, and rolled through the door. The bouncer being a somewhat intelligent man recognized the string at once, and rolled the string back out onto the street yelling "Don't come back ya dirty string!"

The third string, after seeing his fellows turned away, had a moment of inspiration. He jumbled himself up, stretched as tall as he could and messed up his hair. Proudly he waltzed through the door where he was met by the bouncer.
"Aint you one of them strings?" The bouncer growled.

The savvy string replied "Nope, I'm a frayed knot!"