And before you start in on "legal documents," remember Lisa Kebreau and Mikolle Mozelle spent $6,000 on legal documents to give them just a few of the rights that heterosexuals can get for the cost of a marriage license and a short wait. The cost of a marriage license is $55 in my area of Maryland, and the wait is about three days. That and a blood test gets you about 1,040 federal rights and protections in addition to whatever you get from the state. And those rights, the federal ones at least, will follow you anywhere you go. Marry in Maryland, and you're married in Mississippi, Montana, Mexico, and Moldavia. And no matter what happens, you don't even have to draw up so much as a will, because your spouse will automatically inherit a portion of your estate. (Business licenses in your name are inheritable too, as part of those 1,040+ rights and protections you got for $55 and a 3-day waiting period.)
By contrast Kebreau and Mozelle spent something like 109 times the cost of a marriage license, for legal documents that get them a tenuous hold on maybe three of the 1000+ benefits and protections of marriage, and the process of drawing up their documents probably took more than three days. And even then there's no guarantee those documents will be recognized or honored when presented at the hospital, as happened to Bill Flanigan. And the few rights you may secure at a much higher price, you must leave at the state line if you so much as take an overnight trip or a vacation, because you can't take them with you. So, if you're gay, you pay more, wait longer, and get less. And what you get may turn out to be nothing, but you won't know that until you really need it. Nevermind that some states have tried to nullify even those few meager, shaky legal protections. Meanwhile, you keep contributing to Social Security, pensions, and health insurance your partner can't share or inherit; basically subsidizing heterosexuals who do get all the rights and protections of marriage, at a discount compared to what the "gay tax" gets you.
You really should go read the entire thing. Right now.