Wrong, The IRS and states recognize common law marriages.<quoted text>
Try convincing the IRS that you're "married" if you're just shacking-up. Common Law Marriage is only recognized in 9 states at this point. And no other state is forced to recognize a Common Law Marriage from another state.
Again, the basis of governmental prevailing interest is because of the women and children.
All of this still begs the question, ss couples are only ever a barren senseless duplicate half of marriage.