Answer:
You use it between your head and your toes, the more it works the thinner it grows. What is it?
What eight letter word has "kst" in middle, in the beginning and at the end?
What has fingers and a thumb but no hand?
What is red and smells like blue paint?
I look at you, you look at me, I raise my right, you raise your left
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.