On the show, Sister Wives, a man from Utah is married to four women. This is a consensual relationship between the five of them, they are all adults, and their relationship, though complex, seems to suit them well enough.

Is there anything wrong with such a relationship? No, it's fine. Consenting adults should be allowed to engage in any kind of relationship they want, so long as no one is being wronged or abused.

If a woman wants two husbands, or ten husbands, and she can find two or ten men of a like mind, more power to her. Such a relationship has many benefits. The group can pool their resources, the woman can continue to have a partner or partners if one or more of her husbands die, and there is much less consumption of natural resources, as they can all live in one house. Such multi-partner arrangements are common in some rural areas of third world countries and historic in religious communities.

Sexual relations in such a marriage always draw titillating attentions. I see no issue at all. If they decide to take turns, say one wife or husband per night, or engage in a menage relationship, well, what they do in their bedroom is no one's business but their own.

There can be good or bad polygamous relationships, just as there is good and bad relationships in traditional marriages. But the divorce rate is approaching 50%, and there is a tremendous amount of abuse, neglect, and boredom in many households. How can they criticize the idea of a woman or man with multiple partners?

Personally, I couldn't care less if a woman marries a football team or a man has ten sister wives, but I think it would be psychologically taxing, to say the least. Trying to keep one partner happy is tough enough. I can't imagine the emotional mine field three or four or five wives would present. It's not my cup of tea. But if they want to do it, go for it.