I really like this line of argument. As I have been thinking about the issue of marriage definition (and I suppose we've all been thinking about it), one of the nagging and difficult to define issues is the one of commitment. What legal forms of commitment can/should be attached to marriage? Also, if "gay marriage" begins to become a legal reality in various parts or the whole of our country, how many people will decide to become "legally gay" for the purpose of obtaining benefits of some kind? I'm afraid this will all be getting only messier over the next 20 years.