Answer:
Though desert men once called me God today men call me mad. For I wag my tail when I am angry. And growl when I am glad.
Break me and I am better immediately set and harder to be broken again.
I look like a tiny trombone
I can run but not walk. Wherever I go, thought follows close behind. What am I?
I am the place to turn to when nature calls. What am I?
No matter how little or how much you use me, you change me every month.