I don't place it in fornication. Neither does God nor Paul, but Paul says the very act makes two people one flesh, even the act of fornication. Define fornication. Here is a definition I found: "Fornication is a more general term usually referring to any kind of sexual misconduct or sexual impurity outside of the bounds of marriage."
I'm glad we agree on the generally accepted definition of fornication.
Now let's see whether two people are fornicating or if they are actually in the bounds of what God considers marriage.
And I would first point out in regards tot his...fornication demands intimate relations.
Outside the bounds of marriage, therefore we must define the bounds of marriage.
This is applicable only in the sense that intimate relations are not considered fornication.
So we further define fornication as any intimate relations outside of marriage which helps us to answer the OP concerning how we would arrive at a Biblically based marriage, or what constitutes as marriage in the eyes of God.
And Paul is not teaching that God is saying this...
1 Corinthians 6:16 What? know ye not that he which is joined to an harlot is one body? for two, saith he, shall be one flesh.
This is not meant to be a proof-text to define and teach God's will concerning marriage, but the opposite...to keep believers from fornication.
It is not a bride in view, it is a harlot. So the act in view makes the woman a harlot. The immediate text clarifies this:
1 Corinthians 6:15-18
King James Version (KJV)
15 Know ye not that your bodies are the members of Christ? shall I then take the members of Christ, and make them the members of an harlot? God forbid.
16 What? know ye not that he which is joined to an harlot is one body? for two, saith he, shall be one flesh.
17 But he that is joined unto the Lord is one spirit.
18 Flee fornication. Every sin that a man doeth is without the body; but he that committeth fornication sinneth against his own body.
We can't justify pre-marital sex and then say, "Well, you guys sinned...you're married now."
Rather, they are told they have sinned according to the very Word of God.
Marriage is therefore an agreement between two parties to form a family bond or a bond as two coming together to make one. That is the commitment like Mary and Joseph had committed and by the Law of Israel would have had to divorce from their agreement. Here is where many lose sight of what marriage is, yes the act makes them one in God's eyes. But that bond is never really broken.
I agree, a marriage is an agreement between two parties...
...when it is secular marriage in view.
Christian (and that is really our focus) and Biblical marriage is an agreement between three parties, the Primary being God Himself.
The husband and wife agree to God's will in regards to marriage, whereby neither would justify "going into their mother's tent" and then trying to say that constitutes Biblical Marriage. It wasn't the case in the culture of that day, and it is not the case in our culture. Even unbelievers know this, and teach their kids, if their kids are lucky...to restrict intimate relations to the person they marry.
My wife was taught this by her father, a Marine who drinks quite a bit who is not in relationship with God in any visible manner (though he has changed his views quite a bit since my wife and I were married, thankfully). My wife attended a Baptist Church when we met and her father thought they were a cult, lol.
In the culture of Joseph and Mary, betrothal was as good as being married, and that does not deny that there was a custom in regards to marriage in that day. That no ceremony had yet taken place is irrelevant, the relevant issue in this discussion is that Scripture makes it very clear...
...they were not living together and they had not had intimate relations yet.
There is no justification for us, in our culture, to try to bypass this fundamental teaching in Scripture and say it is okay for anyone, teen to elderly...to live together as man and wife apart from the traditional ceremony and laws of the land that even gay people fight to have the right to.
That is ironic, no? Gay people want to be recognized as married in the eyes of the law, yet Christians are debating whether one has to actually go through the "ritual" of marriage?
Continued...