Historically, like thousands or tens of thousands of years ago (or maybe still today in some parts) marriage was originally a way to unite clans or communities, families, by basically putting a daughter into the other clan by 'marriage' to a specific man or 'husband' to have babies - new blood for the clan. And it was just as much a political move as anything else. I don't think love had much to do with it - that didn't come till later on in history. So, this 'getting married' idea, is nothing more than a social construct dating back to ancient times, a very old custom. It is. But love, love is a completely different thing. That's all I can say. 🙂