I've been wondering, lately, whether the possibility a legally recognized "domestic partnership" of some kind might not be feasible for any two people who just find that the arrangement makes practical sense.
In other words, any two people could set up housekeeping together... call them roommates. It has nothing to do with foggy notions of romantic love, or sexuality or with any emotional component at all. It has nothing to do with redefining marriage or the family, but is fair to people who want to establish legal ties for practical reasons.
Let's say for the sake of argument that it's two old guys who argue all the time. They just find forming a working partnership makes life easier. They can look out for one another. One might have a steady income, say, but be unable to keep up with household chores. The other takes care of the day to day chores, but depends on the income of the other, and maybe needs the health benefits, too.
It appears to be fair, but it may have implications for the traditional family that I'm not seeing. And, I have a feeling a lot of gay activists would reject it, even though it is what many of them have claimed to be after for so long. Redefining marriage and the family seems to be the real point with some.