Answer:
I am always in front of you, but yet I am never here. What am I?
When young I am sweet in the sun. When middle-aged I make you gay. When old I am valued more than ever.
What can travel all around the world without leaving its corner?
I am one with eight to spare, lest I lose my one. I'm not a number. What am I?
I am the most famous dinner ever attended. What am I?
When is it bad luck to see a black cat?