Next up, polyandry and polygamy as valid “marriages.”
There is no argument that can be made for gay “marriage” that cannot also be made for multi-spouse.
There is no requirement for a sexual component to marriage. Once plural marriage is affirmed, the next step will be for wealthy parents to collectively marry their children and grandchildren to end run inheritance issues. This “marriage” meddling will be the end of the death tax.
Except the power of normative theories. There are no sitcoms about polygamists that I know of. Jennifer Lopez hasn’t made a romantic comedy where her best friend is a polygamist.