Answer:
I'm a word that is not even strange. What am I?
I hold two people together but touch only one. What am I?
If a man carried my burden, he would break his back. I am not big but leave silver in my tracks. What am I?
I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word.
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.
No matter how little or how much you use me, you change me every month.