What Am I Riddles

Question: Had by few but treasured by all,
I'm on the inside and outside and I make men fall.

What am I?

Question: I'm the eyelid to your life and hide you when you're inside.
You can draw me and you can pull me, but you must leave to see my good side.

What am I?

Question: I am made of scraps and rags, Yet when I am put together, I keep you warm in the winter. What am I?

Question: I am almost nonexistent through sorrow, yet am frequent through happiness. I have no contact, yet I am contagious. What am I?

Question: What goes black when you buy it, red when you use it, and goes white when you throw it away?