AN ARGUMENT AGAINST POLYAMOROUS MARRIAGE
P1. Polyamorous wedding vows cannot include a commitment to sexual exclusivity
P2. Removing a commitment to sexual exclusivity in wedding vows would likely lead to less sexual exclusivity in marriage
C. Therefore polyamorous wedding vows would likely lead to less sexual exclusivity in marriage
In a polyamorous marriage, there is always the possibility for another spouse to be added to the marriage. This removes the ability to promise sexual exclusivity as part of the wedding vows.
This would, over time, weaken the expectation of sexual exclusivity in the public understanding of marriage, which would be devastating for our solution to the social problem that every society must solve.