Answer:
I am a box that holds keys without locks, yet they can unlock your soul.
Metal or bone I may be, many teeth I have and always bared. Yet my bite harms no one. And ladies delight in my touch.
What points the way without a hand. It floats on water but exists on land?
What has three ways out and just one way in?
What is put on a table, cut, but never eaten?
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.