Answer:
My teeth are sharp, my back is straight, to cut things up it is my fate.
You use it between your head and your toes, the more it works the thinner it grows.
A house full, a yard full, a chimney full, no one can get a spoonful.
Left to right I’m quite bright. Right to left I might bite.
Walk on the living, they don’t even mumble, Walk on the dead, they mutter and grumble. What are they?
When is it bad luck to see a black cat?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?