Answer:
The person who makes it has no need for it. The person who purchases it does not use it. The person who does use it does not know he or she is. What is it?
I am round as a bowl, deep as a tub, but all the world's water couldn't fill me up.
The barber of New York shave all men in New York. No man living in New York is allowed to shave himself. The barber of Nee York lives in New York. Who shaves the barber ?
A man parks his car outside of a hotel and immediately realises he is bankrupt. How did it happen?
I can be written, I can be spoken, I can be exposed, I can be broken.
I have two eyes in the front and a lot of eyes on my tail