Answer:
If I have it, I don't share it. If I share it, I don't have it. What is it?
Take off my skin, I won't cry, but you will.
What binds two people yet touches only one?
The man who made it didn't need it. The man who bought it didn't use it. The man who used it didn't want it.
A house full, a yard full, a chimney full, no one can get a spoonful.
What did the piece of wood say when he saw the screwdriver and screws approaching?