It's called
polyandry, and it's rare.
A great deal of these multiple wife/husband marriages are about sex. They have to be, as sex is so integral to the marriage, so you can't tell me that sex has nothing to do with it.
Also, the thing with the young girls is disgraceful. Girls as young as 11 and 12 being "married" to men who are middle aged? That is statutory rape. (Don't anyone tell me it happened in the Bible. That was a long time ago, and a long way away, and it is not legal in our society, nor should it
ever be.)
I cannot see those marriages working in the long term - the ones shown in SW I mean, with adults, not children. Jealousy is natural. How would it be to not only suspect that your husband is having sex with other women, but to know that - 3 or 4 nights of the week - he
is having sex with other women? And you get to sit with those women at the kitchen table. It's distasteful to me. It is totally outside the norm of marriage vows which are about being faithful and true to your spouse. Maybe they will say, well, he is being faithful to his spouse
s, but it doesn't work for me. I feel sorry for the children being raised, generation after generation, to assume this is the norm.