Answer:
Without a bridle or a saddle across a thing I ride a-straddle. And those I ride by help of me though almost blind are made to see.
I am a kind of coat that can only be put on when wet. What am I?
I am a king who’s good at measuring stuff. What am I?
I have two eyes in the front and a lot of eyes on my tail. What am I?
I saw the dead bring forth the living. I saw the living bring forth the dead. What did I see?
No matter how little or how much you use me, you change me every month.