Answer:
I move without wings Between silken string I leave as you find My substance behind.
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. What am I?
Kings and queens may cling to power and the jester's got his call. But as you may discover the common one outranks them all. What am I?
Why are there no living cats on Mars?
What breaks when you say its name?
No matter how little or how much you use me, you change me every month.