Answer:
Arnold Schwarzenegger has a big one, Michael J Fox has a small one, Madonna doesn't have one, The pope has one but he never uses it, Bill Clinton has one and he uses it all the time! What is it?
It increases and decreases yet no one see it. It is not a fire and yet it can be quenched.
What has many keys, but can't even open a single door?
You will have this response if you would go salivating at the mention of a cheeseburger.
Millions of these are crushed every morning to help people wake up.
I am a shimmering field that reaches far. Yet I have no tracks and am crossed without paths.
Funny
Animal
Difficult
Easy
Food
Kids
Logic
What am I?