Answer:
What is the difference between a poorly dressed man on a bike, and a well-dressed man on a unicycle?
Everyone has me except for a few. You may not be able to identify me but I can always identify you. What am I?
I belong to you but others use me more often than you do. What am I?
Whoever makes it tells it not. Whoever takes it knows it not. Whoever knows it wants it not
I am the home for feathery animals.
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.