A marriage is between me a man& a woman period anything g else is something else
The issue is the act of sodomy
When that was legalized the issue was lost
Which is to say, if your "straight" couples aren't upholding the norms of Biblical marriage ONLY and natural sex ONLY, you know darn well you're in a poor position to demand that of the gheys. Deviants? The vast majority of "straights" have already deviated. The deviants can say, "Why not us, too?"