It should be someone's choice if they prefer to marry the same sex as them why stop it? Most of the world has learned with 8 billion+ people we really don't need to reproduce anymore as much as we use to when the population was less than a billion. Nowadays we also have had technology advances which only make it easier to reproduce even if you're gay.
Then why dont you spread same sex love where all the reproduction is done these days? Like Africa and middle East... oh, wait. I forgot, they would kick you so hard in the ass, that you would search for it in the google maps.
Why the fuck should we amend family structure of entire society for a minority, that is completely fine as it is and consists of maybe 5% of all people?
Why? Who does it serve? Guilty conscience of liberals?