many of us who believe in who musket dismisses as superstition are of the opinion that the reason so many people think that marriage is defined as one man to one woman almost universally, is that mankind is Gods creation and that he imparted general moral norms, and institutions. in addition, there is still a residue of Christian heritage even in many who are not otherwise practising Christians, that comes from centuries of Christianity in GB.
Either way, acceptance of homosexual "marriage" does not , imo, sit comfortably with many people , despite the spin put on it, or the intimidating tactics used by its supporters against detractors of the current drive to redefine marriage.