Easy Riddles and Answers

Question: I am almost nonexistent through sorrow, yet am frequent through happiness. I have no contact, yet I am contagious. What am I?

Question: What did Robin Hood say, when Little John fired at him?

Question: I am dark and can never be light, but I can be lit. What am i?

Question: There are two mothers and two daughters. They go to a restaurant and ask for 3 chairs. Why?

Question: What goes black when you buy it, red when you use it, and goes white when you throw it away?