Answer:
He has one and a person has two. A citizen has three. And a human being has four. A personality has five. And an inhabitant of earth has six.
I'm full of holes, yet I'm full of water.
Lighter than what I am made of, More of me is hidden Than is seen.
At first, I am nothing. Add something to negate. Add again to oppose. Add again to find the time to draw. Add once more to find nobody at all.
When the horse strokes the cat, the wood begins to sing.
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.