SS couples will only ever be a mutually sterile, duplicate gendered half of marriage.<quoted text>
There was a point in time when slavery was legal in the vast majority of the U.S.
Since there were so many places where slavery was legal, does that make slavery ethical?
"Might" seldom makes "right". Just because a majority believes that an activity is right or wrong, does not mean they are correct.
A mating behavior defect.
Clearly not the same.
The real question is, why don't homosexuals have the self acceptance to establish their own relational identity and legitimate rights?