How consenting adults order their lives,
When they start popping out illegitimate children that carry on their disfunction and become a burden to society, i.e. collecting food stamps and government health care, it becomes my business.
Wrong. When a men beds more than one woman, he not only has the chance to spread disease but also a chance to get the woman pregnant, which causes further social problems. Boys are often kicked out of polygamist groups and they become a burden on the state or they will act out because they often have no social position or money/property. Look at the country where polygamy is and you'll see more violence towards women. Rapes occur more often because the balance of woman to men becomes distorted.
The real problem is when men start thinking about their penises and having rights over the the betterment of society and women.