Answer:
My sides are firmly laced about, Yet nothing is withinΝΎ You'll think my head is strange indeed, Being nothing else but skin.
I pass before the sun, but make no shadow.
What is it that makes tears without sorrow and takes its journey to heaven?
What is it that has four legs, one head, and a foot?
A precious fluid, thicker than water.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.