Answer:
I can be written, I can be spoken, I can be exposed, I can be broken. What am I?
I am constantly overlooked by everyone but everyone has me.
My head bobs lazily in the sun. You think I'm cute for my face is yellow my hair is white and my body is green.
I am a protector. I sit on a bridge. One person can see right through me while others wonder what I hide.
I go around in circles, but always straight ahead. Never complain, no matter where I am led. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?