What Am I Riddles

Question: The more you work, the more I'll eat.You keep me full, I'll keep you neat. What am I?

Question:

Take me for a spin and I'll make you cool,
but use me when it's cool and you're a fool.

What am I?

Question:

Sad, sick, or sloppy I'll help you out,
Use me right and I'll cover your snout.

What am I?

Question: You are my brother, but I am not your brother. Who am I?

Question: Hold me by the neck and I won't mind,
if I get wrong I just need a good wind.
If you want me you better pick wisely,
just use your ears and I'll follow you blindly.

What am I?