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 always run but never walk, I sometimes sing but cannot talk, No head on which a hat to place, You always look me in the face.
A great mysterious place that the bold have been known to journey into.
The sun bakes them, the hand breaks them, the foot treads on them, and the mouth tastes them.
Only two backbones and thousands of ribs.
What is always coming but never arrives?