One final joke...
A piece of string sidles up to a bar, when the bartender walks over to him, looks him up and down and say "you've gotta be kidding me...string? naw we don't serve your kind in this fine bar...get out!"
Sullen, the string takes a walk. He's sitting on a corner, sulking when an idea forms in his head. He goes to the closest restroom and stares in the mirror. He twists himself, loops himself over, and musses up his hair. Looking a bit ragged he goes back into the bar. The bartender takes one look at him and says HEY!!! Didn't I just tell you to leave?' The piece of string looks at him and says "I'm afraid knot!"