Answer:
What can be seen but never found that only hides in the unwound?
Something wholly unreal, yet seems real to I. Think my friend, tell me where does it lie?
He has married many women, but has never been married. Who is he?
Where humans breath liquid?
Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not. What is it?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.