Answer:
He stands beside the road. In a purple cap at tattered green cloak. Those who touch him, curse him.
I am black when I am clean and white when I am dirty?
He has married many women but has never married.
White fat and fluffy, May even look like a puppy. Seems heavy but is light, Floats about without a worry, But if it turns dark you have to hurry!
A tiny bead, like fragile glass, strung along a cord of grass.
I am rarely touched but often held. If you are smart you'll use me well. What am I?