Separate: Forming or viewed as a unit apart or by itself: "two separate issues" and then Severed: To set or keep apart; divide or separate.
Marriage existed before recorded history. Of course, it varies from one culture to the next, but in western culture it is usually Christianity. This fact is the very reason why gays are being discriminated against in the first place. This misguided and pathetically archaic belief that gays are sinners on their way to hell is still influencing this secular and civil institution. Who would have thought?
Ad populum fallacies abound.