We
went over this ad nauseum
several years ago, and
more than once.
As noted then, the laws against gay marriage are not particularly different than the prohibitions against polygamy and incest (at least when carried out by consenting adults). Each one is illegal wholly by legistative act of the government in defining which marital relations are legal and which aren't.
If courts start striking down gay marriage, on the idea that it's a "right," or "privilege," it becomes more and more difficult for courts to uphold the statutes that make incest and polygamy illegal.
This is why such things should be left to the legislature and the ballot box, and not by the creation of "rights" that aren't mentioned in the constitution.
