Answer:
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 am the key that is the hardest to turn
I ask no questions but receive a lot of answers
The dirtier I get, the whiter I am. What am I?
Fashions change, but what can a person wear that is never out of style?
No matter how little or how much you use me, you change me every month.