Oh, sweet! I love it when people pick and choose which scripture they are going to follow! So, if we are going to use Jesus’ words, lets look at ALL of them!
Matthew, 19:4-10 He (Jesus) said in reply “Have you not read that from the beginning the Creator ‘made them male and female'” and said, ‘For this reason a man shall leave his father and mother and be joined to his wife, and the two shall become one flesh’? So they are no longer two, but one flesh. Therefore, what God has joined together, no human being must separate.
(…Jesus then talks about divorce and that it is immoral. YES DIVORCE IS IMMORAL)
They said to him, “Then why did Moses command that the man give the woman a bill of divorce and dismiss [her]?” He said to them, “Because of the hardness of your hearts Moses allowed you to divorce your wives, but from the beginning it was not so. I say to you,* whoever divorces his wife (unless the marriage is unlawful) and marries another commits adultery.” [His] disciples said to him, “If that is the case of a man with his wife, it is better not to marry.”
Mark, 10:6-12 But from the beginning of creation, ‘God made them male and female. For this reason a man shall leave his father and mother [and be joined to his wife] and the two shall become one flesh.’ So they are no longer two but one flesh. Therefore what God has joined together, no human being must separate.” In the house the disciples again questioned him about this. He said to them, “Whoever divorces his wife and marries another commits adultery against her; and if she divorces her husband and marries another, she commits adultery.”
I think it is quite clear here that Jesus is not changing marriage (even though he could have if He wanted to) and re-enforcing what has already been handed down.
Really, “gay marriage” makes absolutely no sense. The purpose of marriage isn’t because “two people love each other and want to spend the rest of their lives with the other”. That’s what most people think is the definition today. Certainly, that is a FACTOR that plays into determining if it would make sense to enter into the marital covenant. However, the end-all purpose of marriage is for children to be born, and for mother and father to be role-models to those children. Needless to say, a mother being a female and a father being a male (how else could it possibly be?)