1) Marriage has NOT and should NOT be defined by government. It was defined by GOD, and that is the way it will always be (regardless of what any government will decide), and it is SO important to keep it that way (if we have a say in it).
2) The article says, "Brad Pitt, who once said he won't get married until the right extends to everyone..." Pardon me? Since when has marriage been a RIGHT!? It is NOT a right, but rather a privilege that is granted when a MAN and a WOMAN are ready to enter such a sacred union. Here is part of what is wrong with same-sex marriage!! People want the same RIGHTS as everyone else. That's not how it should be looked at, again, because marriage should not be looked at as a right.
3) Brad Pitt and Angelina Jolie are NOT married!! Yet, they continue to bring children into their "relationship" (be it by adoption, or even their own). I don't know if I need to say anything more.
As a result of this little part of research, I have decided to post some links that should take you to some good reading.