Well I live in Utah so my view of polygamy is a negative one. The girls here are married off very young like you were saying which is just not healthy or appropriate. They are brainwashed into doing so and get shunned for running. As far as a consensual polygamist relationships I think it's ok as long as they aren't hurting anyone. Also known as polygny which is just a relationship between a couple where they each have a separate girlfriend/boyfriend as well. There are many different kinds of relationships people choose to have. Just like gay marriage I think people have the right to choose how they want to live as long as no one is being hurt or taken advantage of.