The Basic Design for Marriage in the New Testament

According to this passage, there seems to be three things necessary for a marriage. According to genesis two, both partners need to be human. Both partners have to come from different families and both partners have to display sexual difference. This is why this verse is so often quoted in the new testament when the question comes up. Now i want to skip over sodom and gimorro, because, honestly, i think it has nothing to do with this debate. I want to jump into leviticus 18 and leviticus chapter 20. But like we are talking about god's basic design for marriage.