Well that might have been true in 1996 But these days in several States as well as countries there is also same sex marriageMarriage
marriage [mar-ij] n
1 : the state of being united to a person of the opposite sex as husband or wife in a legal, consensual, and contractual relationship recognized and sanctioned by and dissolvable only by law see also divorce
2 : the ceremony containing certain legal formalities by which a marriage relationship is created
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.
Here is what MW has to say today:
a (1) : the state of being united to a person of the opposite sex as husband or wife in a consensual and contractual relationship recognized by law (2) : the state of being united to a person of the same sex in a relationship like that of a traditional marriage <same-sex marriage>
Marriage - Definition and More from the Free Merriam-Webster Dictionary