Answer:
I am always in front of you, but you will never see me. What am I?
Turn us on our backs and open up our stomachs you will be the wisest of men though at start a lummox.
This is in a realm of true and in a realm false, but you experience me as you turn and toss.
A hole leading in, a hole leading out, we connect to a cavern that is slimy all throughout. What are we?
Walk on the living, they don’t even mumble, Walk on the dead, they mutter and grumble. What are they?
I’m grown from darkness but shine with a pale light. Very round I am and always a lady's delight.