Answer:
Slayer of regrets, old and new, sought by many, found by few.
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
It's anything but amusing when this body part gets hit.
What kinds of men are always above board?
What goes in the water red, and comes out black?
What did the piece of wood say when he saw the screwdriver and screws approaching?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?