Surely you have heard the story about three pieces of string who go into a bar.
The first piece of string orders the drinks and the barman says, "We don't serve strings in here."
The second piece of string fails as dismally.
The third piece ties himself up, fluffs out his ends and saunters up to the bar. "Three beers and make it snappy!" he shouts. The barman turns around and looks puzzled. "You're a string, aren't you?" he asks.