It is of course the hallmark of a post-enlightenment secular civilised society that except where actual physical or mental harm is caused to persons or beasts that those with abnormal sexualities should not be persecuted for their sexual fixations. The sciences of psychology and psychiatry have allowed us to understand, from a variety of viewpoints, that there are those whose mental development in this area is arrested at the stage of infant sexual narcissism and that their adult inclinations are therefore inverted. So long as such persons remain in the minority, their behaviour is by definition abnormal but in practice tolerated by the majority. In every other respect, most are entirely normal.
The gay marriage business is therefore nothing to get particularly excited about. We will not be less tolerant of harmless sexual abnormality, Freudians and Jungians will continue their therapeutic psychoanalyses, psychiatry textbooks will remain on the shelves, the catechism and canon law of the Church will remain unchanged and the normal sexual behaviour of the majority will not be undermined. Most inverts will be sensitive to the reality of buggery still being offensive to many and will continue to be discreet. I'm sure we'll learn to live with it.