In Matthew 19:3-6, Jesus says:… “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 even says, “THEREFORE, what God has joined together, no human being must separate.” The use of the word “therefore” here seems to mean that it is directly BECAUSE the two are no longer two but one flesh, which is synonymous with having sex. But in the verse quoted above, it seems that Jesus treats them as the same, and just addresses the two becoming one flesh as what should not be separated, not necessarily treating it as if there is one or the other. He seems to treat it as if that “becoming one flesh” makes you married, and you should not be separated.