This opens up the door to polygamy and polyandry, as well as interspecies unions and marriage between close blood relations.
I guess when tribes lost their authority over the relationships between their members, just about anything was considered equivalent. But only one combination produces children of relatively certain parentage.
A well-ordered society does not countenance of these aberrations and deviancies.
This opens up the door to polygamy ....They already have a “Sister Wives” tv show....that guy should be in jail!