This article (linked below) makes (amongst others) a good point that should be made more. Specifically, the idea that "same sex marriage" is the same as (actual) marriage implies that both mothers and fathers are dispensable. i.e. The roles of fatherhood and motherhood are optional/replaceable. Since (according to proponents) two men, or two women, can equally well bring up children as a father and a mother, therefore both motherhood (if the two happen to be men) or fatherhood (if they are women) are unnecessary. You don't need a mother; two fathers can suffice. You don't need a father; two mothers can suffice. You don't need to a home in which you experience the inter-relation of the sexes whilst you grow up. This brings out more clearly the link between "same sex marriage" and the radical sixties teaching that gender is merely a social construct - that a man can be a mother, just as he can be a wife, etc. We force them to stop arguing vacuously that "it's all about lurrve, we luurrrve each other so why shouldn't we marry?" When those implications are more clearly spelled out, more people will realise what an absurdity the idea of "same sex marriage" is. Thus we should do so.