Early nomads in the middle east, where modern civilization arose, allowed a wife to have a tent of her own which she kept completely independent of her husband. The early Israelites kept this custom as well, as shown in the last book of Proverbs.

http://kennethharperfinton.me/2015/06/30/love-and-marriage-then-and-now/

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Love is seen everywhere in the natural world as adults pair and care for their mates and their young. Love is evident throughout nature. It is seen in the bonding that forms the very chemicals of life.

Love is accepting another as a part of oneself. Love is the inclusion of the other into the very fabric of everyday life. Love unites and draws together like iron fragments to the magnetic field. In human terms, love expands the isolated and alone self to include beings and objects from outside the self.

Love is felt not just for living things, but for actions and methods of performing actions. The world is built on attraction and love, caring and nurturing. The desire and urge to be more than we are alone is the driving force of evolutionary progress.

Love may be the primary reason for existence itself, as primal awareness, discovered the other outside itself, reflected upon it, accepted it within itself, and gave birth to an entire universe. The idea is not so far removed from the ideas of the ancients Greeks and the stone-age tribe dwellers.