Answer:
It goes up and down the stairs without moving.
What should you do when you see a green man?
What is in the middle of nowhere?
What do roses, chocolates, laces, love knots, the color red and hearts have in common?
Never ahead, ever behind, yet flying swiftly past; For a child I last forever, for adults I'm gone too fast.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.