Answer:
What lies in a tunnel of darkness. That can only attack when pulled back?
I hide but my head is outside.
Round as an apple, deep as a cup, and all the kings' horses can't fill it up. What is it?
You get many of me, but never enough. After the last one, your life soon will snuff. You may have one of me but one day a year, When the last one is gone, your life disappears.
Fatherless and motherless. Born without sin, roared when it came into the world. And never spoke again.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.