Answer:
What is up that’s also down? What’s a smile and a frown?
I am always hungry, I must always be fed. The finger I lick will soon turn red.
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.
I'm not man's best friend, I'm their enemy, I can mark your end, yet you do not see me, I am very small, but very tough, If you have me, then you have it rough.
When does Christmas come before Thanksgiving?
When is it bad luck to see a black cat?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?