Supporting Polygamy

In a column called Polygamist marriage challenge 'inevitable' on Canoe by  Mindelle Jacobs she writes:

Some have argued that polygamous communities are not a threat to society, but that view ignores the substantial harm suffered by women, children and, in some cases, young men, says Kent.
In Utah, he notes, hundreds of young men have been forced out of polygamous communities to prevent them from competing with older men for sexual access to the girls.

The point about young men being forced out of communities is not one I had considered before in my support for polygamy, but I will say that my conditional support for polygamy assumes that it is one piece of a larger community and not the only form of marriage allowed. Closed religious communities such as Bountiful B.C. are not a healthy situations for the girls and boys involved.

Another question came to me while reading this article. I can see a man having two wives and making that relationship work, but I have a harder time seeing a woman having two husbands that are comfortable in the relationship. Is it because I am sexist or do I have a real appreciation for the general psychology of men and women? I'm not sure.