Answer:
I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word.
I go inside boots and outside shoes.
I carry you down a gentle stream.
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?
Crooked as a rainbow and slick as a plate, ten thousand horses can't pull me straight. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.