Answer:
The more you take away, the bigger it gets.
You use it between your head and your toes, the more it works the thinner it grows. What is it?
A tiny bead, like fragile glass, strung along a cord of grass.
A tasty reward given to well behaved dogs and kids
The line a runner strives to reach
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?