Answer:
What is it that given one, you'll have either two or none?
I am always hungry, I must always be fed. The finger I lick will soon turn red.
The profession of Jimi Hendrix and Eric Clapton
What can you hold in your left hand but not in your right hand?
What can travel around the world while staying in a corner?
What can you lose that will cause other people to lose theirs too?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?