Answer:
Everybody's got one.
It can be used onstage or to express admiration. What is it?
One more than a duet.
What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?
Four kings of whom I am one lord. Often on deck but never on board. Though I have a large heart, I am always seen at war. During which I always wear a suit, but never a suit of armor. Who or what am I?
I go in hard come out soft. Blow me hard and I’ll make a pop.