Answer:
You use it between your head and your toes, the more it works the thinner it grows.
The itsy bitsy teeny weeny yellow polka dot variety is quite popular.
I saw a man in white, he looked quite a sight. He was not old, but he stood in the cold. And when he felt the sun, he started to run. Who could he be? Please answer me.
I am the greatest teacher out of them all, but alas in the end I kill my pupils.
You can spin, wheel and twist, but this thing can turn without moving. What is it?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?