What Am I Riddles

Question: I am as thin as paper, smaller than string. I blow in the wind. What am I?

Question: Feathers, I am as light,
But quite heavy if squeezed tight.
I'm seen as clean and pure,
but often talked about with dirty terms.
What am I?

Question: There is a couple that is always together. They go anywhere they want to go. They can't be separated. No one can touch them. They are the size of a ping pong ball. What is it?

Question: Stars, scores and springs have them. Fingers, and backs have them. Keys, switches and cups have them. Leaders and mothers have them.

Question: To be here is to be close to those dear,
I see no light but feel warmth from within,
it's lonely here but soon I'll be free.

What am I?