Regarding the consequences of redefining marriage toward gender-neutrality, the most common question is:
“How will this affect you getting married?” Or “How will this affect a single straight-marriage?”
News anchors seem to take particular delight in asking this question to those who believe in the natural-conjugal definition of marriage. The answer to those questions are, admittedly, very little.
“Aha!” the asker says, “How could you oppose it when it doesn’t affect you! Your only reason is your religiously motivated hatred!”
Well, imagine the same thing being said about no-fault divorce. True, liberalizing divorce would not have much effect on happy couples. But is that really the only way to measure its impact? Are there no other societal side-effects? No other interested parties to think about?
Same goes for redefining marriage toward gender neutrality. So I would classify the various negative side-effects into three categories…