Answer:
Crooked as a rainbow and slick as a plate, ten thousand horses can't pull me straight. What am I?
Teenage girls are pros at creating me. Learn me in classes.
I am always around you but often forgotten. I am pure and clean most of the time, but occasionally rotten. What am I?
I save lives on the ground and in the air. What am I?
Take away my first letter take away my second letter take away all my letters and I would remain the same.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.