Heh. You're right. Let's apply a little foresight to this problem:
If we allow gays to get married, then gays will get married.
Maybe hindsight is better:
Well, the anti-miscegenationists were right -- once we allowed mixed race marriages, it was pretty much a given that the homosexuals would want the same rights. What fools we were!
Is this what you had in mind?
But government...is not simply the way we express ourselves collectively but also often the only way we preserve our freedom from private power and its incursions. --
Bill Moyers (quoting John Schwarz)