When was there ever not some form of government?
Subjugation is different from government.
I will be happy to amend my comment to "legitimate government" or "government in a free society" if it will help you understand the concept.
Homosexual people cannot be married to people of the same sex because God doesn't recognise such unions. It has nothing to do with agreements by unconnected others.
People of the same sex can make committments to each other for a variety of reasons and purposes, but marriage describes a relationship which includes legitimate sexual activity, anal sex or other preferences between individuals of the same sex has nothing to do with marriage.