Answer:
I am black when I am clean and white when I am dirty?
Slayer of regrets, old and new, sought by many, found by few.
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.
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
What has two hands, a round face, always runs, but stays in place?
What do angels sing in the shower?
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?