A free bird in a cage too long goes insane. Especially if the care taker is insane too. Future plans spoil today's plans. An exchange of stones is a symbol that means more than feelings can carry. Wether in the mountains or on the road the stone means the same. Even if the stone's value diminish the symbol remains. A free bird can have no stone but a caged bird has no use of the stone. Now that is a dilemma.