Why don't they make polygamy legal?

I mean being attracted to multiple partners isn't a choice, it's just biology. Many animals have multiple partners. We can't help the way we were born. So you might say that polygamy ruins the sacredness of marriage and is abusive. Well, we certainly can't do any worse than all the monogamous relationships where the husbands beat their wives and couples get divorced. Plus, polygamy is accepted in many nonwestern cultures, where there are loving relationships. What kind of bigots would judge other cultures by declaring our western values superior to them? Where in the bible does it say that polygamy is a sin anyway. Didn't Solomon have many wives? In fact, people should be allowed to marry or have with a plant if they wanted to. You think anyone would be dumb enough to choose to be attracted to a plant or an animal, with all the crap they have to put up with? If you do, then shame on you for being so close-minded and ignorant