OK. "marriage is a sacrament." "Sacrament" is a very specific religious term that in my opinon has no place in a political discussion like this. (Frist may be fascinated to know that some Christians denominations don't actually recognize marriage as a sacrament. Of course, he probably considers members of denominations like that such as myself as decadent moral relativists who aren't really Christian at all.)
Now, the other thing is... if you're going to offer this line of argument about marriage....... isn't the logical conclusion that sexual activity between a man and a woman who are not married should be made illegal? I mean come on, if we have the attitude that people should be married because it's a Good Thing(tm), then surely the LAST thing we want is for folks to think they can just do the deed with no wedding license. I'm waiting to watch one of our friends in Congress introduce this one!!
OK, now, one more thing I'll just post here instead of starting another topic. Look at Justice Scalia's dissent. He complains that if you follow the majority's reasoning we'll no longer be able to outlaw bestiality, bigamy, pedophilia, masturbation... MASTURBATION??? Oh come on! What jurisdictions have laws against masturbation?