Christian Values regarding sex, marriage, and faithfulness to your mate

On one of my political blogs, A Right Angle in a Left Turn World, a non-Christian Conservative commented that the ideas of no sex before marriage, marriage for life, and sexual relations with only your spouse is not in the Bible, it is only interpreted that way by the Church.

In response, I have the following verses (this will be posted as a comment on that blog as well):

1 Corinthians 7:1-9

1Now concerning the things whereof ye wrote unto me: It is good for a man not to touch a woman.

2Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband.

3Let the husband render unto the wife due benevolence: and likewise also the wife unto the husband.

4The wife hath not power of her own body, but the husband: and likewise also the husband hath not power of his own body, but the wife.

5Defraud ye not one the other, except it be with consent for a time, that ye may give yourselves to fasting and prayer; and come together again, that Satan tempt you not for your incontinency.

6But I speak this by permission, and not of commandment.

7For I would that all men were even as I myself. But every man hath his proper gift of God, one after this manner, and another after that.

8I say therefore to the unmarried and widows, it is good for them if they abide even as I.

9But if they cannot contain, let them marry: for it is better to marry than to burn.

You shall not commit adultery. Ex. 20:14.

But I tell you that anyone who looks at a woman lustfully has already committed adultery with her in his heart. Matt. 5:28.

"Haven't you read that at the beginning the Creator 'made them male and female,' and said, "For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh?" So they are no longer two but one. Therefore what God has joined together, let man not separate" (Matthew 19:4-6).