Answer:
Walk on the living, they don’t even mumble. Walk on the dead, they mutter and grumble
Some live in me, some live on. And some shave me to stride upon. I rarely leave my native land. Until my death I always stand. High and low I may be found. Both above and below ground.
You'll see savory dishes in Hong Kong sizzling in these.
What goes further the slower it goes?
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.
You use it between your head and your toes, the more it works the thinner it grows.