Answer:
Could be described as the cranium's version of snow.
What goes with a car, comes with a car, is no use to a car, but the car can't move without it?
What's black and white and red all over?
What did the left eye say to the right eye?
What belongs to you but others use it more than you do?
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.