Answer:
Against the sun I protect your eyes and am often worn on the face of spies
The more of me there is the less you see.
I have married many women but have never been married. What am I?
I am heavy forward, but backward I'm not. What am I?
A young man wants to have me but when he has me he no longer wants me. Blade in hand he attacks me and does his best to remove me. Yet he knows that it is all in vain.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.