Good Riddles

Question: What did the blanket say to the bed?

Question: How many tickles do you need to make an octopus laugh?

Question: What is that thing we buy for eating but cannot eat it?

Question: A man travels by wagon,
brings joy each evening,
but depression by the morning.

Who is he?

Question: To many, I am life's source. I am also its most valuable resource. I create and burn my own precious element, and my destruction will be my punishment. What am I?