Answer:
What is it that no man ever saw, which never was, but always will be?
I always run but never walk, I sometimes sing but cannot talk, No head on which a hat to place, You always look me in the face.
What is used by man, tossed by trees, everywhere but unseen?
This is your stomach's way of letting you know you've neglected it.
Dry though I may be, I am still a sea.
I'm the source of all emotion but I'm caged in a white prison.