Answer:
What can you hold in your left hand but can never hold in your right hand?
What has to be broken before you can use it ?
Ambitious people will climb the social version of this contraption.
What goes trough your head but you forget it like 3 days after?
What can you lose that will cause other people to lose theirs too?
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.