Answer:
I am the place to turn to when nature calls. What am I?
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair.
Use me to reward good behavior.
I start new then become old. Start clean but become dirty. I usually start big then become little. What am I?
I turn everything around, but I cannot move. When you see me, you see you! What am I?
The answer I give is yes, but what I mean is no. What was the question?