Answer:
You use it between your head and your toes, the more it works the thinner it grows.
Three little letters, a paradox to some. The worse that it is, the better it becomes.
I am cracked by Indiana Jones. What am I?
I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go.
What runs around all day. Then lies under the bed. With its tongue hanging out?
Which popular cheese is made backwards?