Answer:
The main difference between us and zombies
What gets bigger the more you take away from it?
What is red and smells like blue paint?
What occurs four times in every week, twice in every month, only once in a year but never in a day?
What goes up but never goes down?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.