Answer:
You use me from your head to your toes. The more I work, the thinner I grow. What am I?
I have fangs and enjoy piecing holes with a single bite.
You write on me and secrets I can keep. In places never seen. I spin like a top. Though stiff as a board I'm often described like a mop.
I've got a beautiful beautiful hall all walled in red velvet with all white armchairs made of bone and in the middle a woman dances.
I am what bring things together. Without me everything you see would be a total mass or debris everywhere.
I am rarely touched but often held. If you are smart you'll use me well. What am I?