What do you think of polygamy?

Well that would only be fair wouldn't it ? But due to the fact that most cultures are male dominated it doesn't seem to be common at all. I've never heard of it.

yes, a woman taking more than one husband does happen, and seems to have been a more common practice than thought, and comes with several benefits for all involved -including the children.
As one example, here's a report on it: http://www.theatlantic.com/health/archive/2013/02/when-taking-multiple-husbands-makes-sense/272726/

@Salix75: Thanks for the link.

There is-was a country which allow polygamy for both women and men