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.
I am always in front of you but you will never see me
I am black within and red without With four corners round about.
I am owned by every man though my length differs. Their wives uses me after getting married.
I fly when I'm born. I lie when I'm alive. I run when I'm dead. What am I?
The answer I give is yes, but what I mean is no. What was the question?