Answer:
What has thousands of ribs and two backbones?
White and thin, red within, with a nail at the end. What is it?
Rotten trees and Jack-O-Lanterns have this characteristic in common.
A young man wants to have it, but when he has it he no longer wants it. Blade in hand he attacks it And does his best to remove it. Yet he knows that it is all in vain.
What is it that after you take away the whole, some still remains?
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.