Is it not very clear that to possess someone is to reduce him from a being to a thing? There is nothing worse that you can do.
Let me repeat, there is nothing worse than this that you can do, that you are capable of: reducing a being to a thing. And that's what possession is. Only things can be possessed; beings cannot be possessed.
You can have a communion with a being.
You can share your love, your poetry, your beauty, your body, your mind.
You can share but you cannot do business.
You cannot bargain.
You cannot possess a man or a woman.
But everybody is trying to do that all over the earth.