Long Riddles and Answers

Question: When you don't have enough of me, you feel a kind of gloom. But when you are using me, it is time that you consume. What am I?

Question: This old one runs forever, but never moves at all. He has no lungs, nor a throat, But you can hear his mighty roaring call.

Question: A man leaves his home, takes 3 lefts gets to home, but there is 2 men with black masks on them, who are these 2 men?

Question: If you're looking for something sweet I know what to do.
But if you don't like heat I'm not for you.

What am I?

Question: There is an ancient invention still used in some parts of the world today that allows people to see through walls.What is it?