Answer:
Against the sun I protect your eyes and am often worn on the face of spies
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
A butcher is 6 feet tall and wears size 12 shoes. What does he weigh?
You can see me in water, but I never get wet. What am I?
Squeeze me and I cry tears as red as flesh, but my heart is made of stone. What am I?
The answer I give is yes, but what I mean is no. What was the question?