First off let me say, I don't believe in state sanctioned marriage or civil unions of anykind. You get a license and pay money to the state. Some places you have to have a blood test and pay money to the doctor. Then you have to find someone to "legally" wed you, you have to pay more money. Not to mention paying for the wedding itself. It really is a money making bussiness. And don't forget nearly half of those "wed" by the state ends in divorce and now you have lawyers getting paid by you in the mix.
Who should care or decide who someone loves and wanting to dedicate their lives to. The Government? The church? Or the two people dedicating themselves to one another. Did God say, "In order for your love of one another to exist in my eyes and the two halves become whole, thou shall be married by the government."? I'm sure someone did but bet it wasn't God. If you want a contractual agreement, just go to a lawer and have them write up a contract that allows you to share everything, a will, a power of attorny and a living will that give the significant other the power to have the say of whether to pull the plug according to your wishes and have control of the funeral. Invite family and friends, wear the dresses or tuxedoes, vow to each other your love and then celebrate. If because of Spiritual beliefs, there are enough open minded ministers and such that will wed you ceremoniuosly even though it's not state sanctioned.
Love whoever you want to love and dedicate yourself to that one person, that is the real spirit of marriage. Not a cerificate from a governmental entity that says they allow you to do the same.
This is just my opinion because I am little antiestablishment, antigovernment and beginning to think antisocial.