Answer:
What language does a billboard speak?
I can be entertaining until you realize some pieces have been lost.
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once I’ve told you all I cannot tell you more.
I'm very tempting so its said I have a shiny coat of red and my flesh is white beneath. I smell so sweet taste good to eat and help to guard your teeth.
I lose my head in the morning and regain back it at night.
No matter how little or how much you use me, you change me every month.