Answer:
What can you break even if you never touch it?
I'm white and I'm used for cutting and grinding. When I'm damaged people usually remove me. What am I?
The more it dries the wetter it gets. What is it?
What has to be broken before you can use it?
When young, I am sweet in the sun. When middle-aged, I make you gay. When old, I am valued more than ever. What am I?
No matter how little or how much you use me, you change me every month.