But the homosexual argument is always about fairness and the ability to marry the one a person loves. That argument does not invalidate the application toward related partners or multiple partners. In fact, there is no requirement of sexual activity. Marrying one’s relative is not incest unless one engages in a sex act with them.
What about same-sex marriage between two brothers or two sisters? If same-sex marriage is considered okay, what’s the argument against incestuous same-sex marriage?