Oh, so those kinda jokes....lets see....
2 strings walk into a bar, the bartender says "We don't serve your kind here" and throws them out. They walk into the next bar, same thing happens. The strings walk from bar to bar all night and still will not be served. The 2 strings decide to sit down on the curb and regroup for a moment. One string turns to the other and says, "I hate this, we can never hit any of the bars. They always take one look at me and thow us right out. When will we get treated right?!?" He gets so mad he starts rolling around in the dirt right there getting angrier and angrier to the point he is all torn and twisted up.
"Thats it, I am going back in there!!", he proclaims and marches back through the door. The bartender looks down at him and says, "Hey, aren't you the string that was just in here?" The string looks up and says, "Nope, I'm a frayed knot".