Answer:
One more than a duet.
Cycle Cycle Cycle.
What does someone else have to take before you can get?
Tear one off and scratch my head, what once was red is black instead!
Women don't have and don't want it. Men get it but sometimes they try to get rid of it. What is it?
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.