Same-Sex Marriage

I was reading through today's posts on the board, and found an argument against gay marriages that I had never heard before. It struck me as remarkably absurd, so I post it here for your amusement:

"Marriage was designed, in essence, for conceiving, bearing, and raising children unto God. He wants us to raise our children under righteous principles so that it may continue from generation from generation. Now brings the simple truth: same-sex marriages cannot have children! There is no reason for me to dive in the physiology and why it is that way; we all understand it. If we allow same-sex marriage to continue, it will proliferate to a point that there will be a huge desire to adopt. So much, in fact, that a married man and women, who are unable to have a child naturally, may not be able to adopt. What would happen for you, Logos, if you were married, unable to have children, and couldn't adopt because there were so many gay marriages wanting adopt also? I would imagine that you would be devastated - your name-sake would not be able to continue."

First, I was struck most by the claim that same-sex couples should not be allowed to marry on the basis that they cannot breed. Following that logic, any heterosexual couple that is unable to produce offspring should also not be allowed to be married. Since when was marriage all about the children? Yes, that's its primary purpose, but certainly not a qualifying necessity.
Second, what's all this about homosexuals wanting to adopt? Yes, there are many that would love to adopt children, but I don't think it's an overwhelming majority. Certainly there are enough children available from the illegitimacy and cohabitation problems that were noted earlier in the answer to supply the highly interested and able homosexuals the ability to adopt without stealing the children away from heterosexual couples. And, the last time I checked, the adoption board will only allow an adoption to go through if it deems the home suitable for raising a child. What difference should it make to society, then, if every child that needs to be adopted is able to be adopted by caring and loving parents in the bonds of marriage? Seems like a pretty good deal to me - a hell of a lot better than we stand now.

I am in no way finding fault with The Board, or the writer of this answer. He was asked to give the argument for those that oppose gay marriages, and he did so. I'm simply using my disagreement with his points as motivation to finally type up some of my thoughts on the issue. I agree completely with his concluding points, for example: "I hope you can see, by these few examples, how same-sex marriage can, and will, affect our society," and "A minority of society, who are pushing for same-sex marriages, do not understand the huge implications of it." It is certain that allowing same-sex marriages will cause a drastic change to the way our society functions, as it attempts to respond to the unintended consequences of such a change. But, I believe that this change is due to come just as it has in other revolutions in the past (abolition of slavery, women's rights, voting rights at 18, etc.). Every time a change is made in policy, it, of course, affects our society. There are those who will claim the received consequences are bad, and others who will claim that they are good. However, this change is imminent, and we had better prepare ourselves for it and figure out how we can make it work, rather than trying to put a halt to the process.