Answer:
What gets sharper the more you use it?
I'm white and I'm used for cutting and grinding. When I'm damaged people usually remove me. What am I?
I am the second L in LOL.
I make a loud sound when I'm changing. When I do change I get bigger but weigh less. What am I?
I stay where I am when I go off. What am I?
I am your mother's brother's only brother in law. Who am I?