This is not even a real issue, but a phony one. People have forged their own chains in this regard. All people need to do is simply deal with the personal and property aspects of marriage separately.
It has never been a legitimate function of government to sanction spiritual unions or promissory sexual arrangements. It's doubtful whether these agreements even possess all the elements of a legally enforceable contract.
Personal unions should be sanctioned only by the parties involved. Just leave government out of the approval process. Those seeking a sense of validation by ceremony may, of course, wish to involve friends or spiritual organizations.
For the protection of adults and children the state has traditionally made provision for tenancy and the distribution of property upon the sundering of unions, whether by death or other means. These provisions apply to all people and can be utilized by them without reference to the nature of the union itself.
Any of the the following legal arrangements can be put into place by any number of individuals living either together or apart. Details relating to these options can be easily researched elsewhere:
1. Sole Ownership
2. Joint Tenancy with Right of Survivorship
3. Tenancy by the Entireties
4. Tenancy in Common
5. Various Forms of Business Ownership
This entire business has become an issue only because collectivist types are seeking majority approval for sexual conduct which is not in keeping with evolutionary principals. The laws of nature and the laws of man are not the same. If a person's behavior makes no unjust encroahment against anyone else then there is no legitimate issue. In the case of marriage all people need to do is simply unchain themselves and just say "No!" to big government.
Eric F. Magnuson