There are some religious people who feel that the only reason for sex is reproduction. Others believe that there are higher reasons for sex: The ultimate joining together of a man and woman–the joining together of two spirits; the joining together of two minds; and the joining together of two bodies.
In the Old Testament the term for sexual intercourse was “to know” (a husband or wife). The most intimate knowledge of marriage partners comes about through these three joinings in a Christian marriage. This is why Christians can have a much more stimulating sex life than non-Christians. Non-Christians cannot join together in the spirit. They lack that extra dimension.
The Bible says that marriage partners should offer their bodies to each other in marriage and should not deny each other except for a short season for fasting (see I Corinthians 7:5). God made men and women sexual beings. He made our nervous systems capable of receiving pleasure from it. Sex in marriage is holy and ordained of God.