^A baby boy is born with a golden screw for a belly button. When
  he is old enough to realize that this is unusual, he asks his
  parents why he has a screw for a belly button. They do not know.
  When the boy becomes a young man, he goes out into the world
  looking for an answer. He asks physicians, magicians,
  scientists, priests, merchants, carpenters, and kings. No one
  knows. Finally, he comes the wisest king of all. The king
  examines the golden screw then sends a boy off to fetch a golden
  box. The king pulls out a golden key and opens the box. Inside
  is a golden screwdriver. The king puts the screwdriver to the
  golden screw and turns. The boy's ass falls off.^