You are the one making stuff up. He did not say that marriage is exclusively between a man and a woman, nor that marriages could not be between two men or two women.
The passage in which he said "that he which made them at the beginning made them male and female" in Matt 19 is about divorce, and has nothing to do with either homosexuality or how many people can be married. Jesus is saying that any man who divorces his wife to marry another is committing adultery, and that any man who marries a divorced woman also commits adultery.
In fact, later in Matt 19, Jesus explicitly states that the original one-man-one-woman model of marriage isn't for everyone, and gives a few examples.
"All men cannot receive this saying, save they to whom it is given. For there are some eunuchs, which were so born from their mother's womb: and there are some eunuchs, which were made eunuchs of men: and there be eunuchs, which have made themselves eunuchs for the kingdom of heaven's sake. He that is able to receive it, let him receive it." -Matt 19:11-12
Furthermore, King David was personally given seven wives by God, so the idea that marriage is always supposed to be between "one man and one woman" is obviously a bunch of poppycock.