PREMARITAL SEX part 2

God's sex position
What does the Word of God's grace say on sex? How does it answer your question about premarital sex and sin?
Firstly, and most importantly, the word of His grace reveals to us the incredible bonding that God made the act of sex to bring about. Paul reminds the Ephesian church of God's written word related to marriage. He quotes Genesis 2:24,
For this cause shall a man leave his father and mother, and shall be joined unto his wife, and they two shall be one flesh.
Ephesians 5:31 - NKJV
The act of sexual intercourse has such a strong bonding effect that God describes engaging in it as bringing about such a union of a man and woman as for them to become, as it were, one flesh or one body!
(Note: There is no problem to this within a stable marriage situation, in fact, it's just as it should be. Consider, though, the consequences to a boy-girl relationship where not marriage has been entered into. A break up will mean that this strong bonding brought about by sexual intercourse will be rent apart. In this case the rending is likely to be emotionally more painful than usual.)
Sexual intercourse
Paul was very direct in writing to the Corinthians. In his letter to them he speaks plainly about the act of sexual intercourse with a prostitute but he does so to illustrate the effect engaging in sex has on you. He writes,
Don't you know that if a man joins himself to a prostitute, he becomes one body with her? For the Scriptures say, 'The two are united into one'.
1 Corinthians 6:16 - New Living Translation
On the basis of this, Paul then draws the following conclusion,
Run away from sexual sin! No other sin so clealy affects the body as this one does. For sexual immorality is a sin against your own body.
1 Corinthians 6:18 - New Living Translation
What does this all add up to? God has given the beautiful and wonderful gift of sex to be engaged in within the marriage union to make that marriage union unique within the experience of us all.
Sexual intercourse within marriage is for this reason good and of great blessing both to the couple, to the family and to the church. However, outside of marriage it creates a conflict of soul and body. This conflict may not at first be evident but later it can result it real soul damage occurring between the two people involved. (See 1 Peter 2:11.)
The Christian church refers to sex outside of marriage as sin. Why is this then? Because, in the way I have explained above, it is not God's design or plan and therefore not His will.
Sex outside of marriage
A straightforward scripture related to sex outside of marriage is -
Nevertheless, because of sexual immorality, let each man have his own wife, and let each womanhaveher own husband. 1 Corinthians 7:2 - NKJV
You then get a pretty good idea of the view presented in the New Testament about sex outside of marriage by putting that verse alongside this scripture portion -
For this is the will of God, your sanctification: that you should abstain from sexual immorality; that each of you should know how to possess his own vessel in sanctification and honor, not in passion of lust, like the Gentiles who do not know God
1 Thessalonians 4:3-5 - NKJV
The Message - a good, popular modern translation of the Bible - puts that same verse this way:
God wants you to live a pure life. Keep yourselves from sexual promiscuity. Learn to appreciate and give dignity to your body, not abusing it, as is so common among those who know nothing of God.

Supplement
I have received some responses to this page asking me to define the term premarital sex. Please therefore find a definition of premarital sex below.
Definition of premarital sex
Strictly speaking it refers to sexual intercourse (penetration) taking place outside of a marriage relationship established before God. However, people talking about it may give it a wider meaning. They may use it to refer any kind of sexual contact beyond boy-girl kissing although strictly speaking this is not the case. The reason they do this is because once you start down the road of sexual contact (petting, fondling) it is often very difficult to pull on the brakes and come to a complete halt before the act of sexual intercourse.