Answer:
What goes in the water red, and comes out black?
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.
It is the assumed nocturnal symbol of Mr. Wayne. What is it?
What gets closer when you blink?
My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
You use it between your head and your toes, the more it works the thinner it grows.