Answer:
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. What am I?
My voice is tender my waist is slender and I'm often invited to play. Yet wherever I go I must take my bow or else I have nothing to say.
Die without me, never thank me. Walk right through me, never feel me. Always watching, never speaking. Always lurking, never seen. What am I?
I am a protector. I sit on a bridge. One person can see right through me while others wonder what I hide.
I do not have eyes but I once could see. I used to have thoughts but now Iām empty.
No matter how little or how much you use me, you change me every month.