Christian teaching about sex is not a set of isolated prohibitions; it is an integral part of what the Bible has to say about living in such a way that our lives communicate the character of God. -Rowan Williams
God created sex. In Genesis 1:28, God told Adam and Eve to “Be fruitful, and multiply…” Therefore, sex is a good thing, when done the right way and in the right context. And when done in the right way, sex is one way that we honor God.
True Christian teaching about sex is just as this quote says. Yes, there are things we should not do sexually as Christians. However, if we love Jesus, we won’t want to do those things, and, as long as we claim His strength and do our part, He will help us to stop if we are. (By the way, if you struggle with wanting to sin sexually, read 1 John 1:9 and Philippians 4:13. God will forgive the truly repentant and will cleanse you and put a hatred for that sin in you).
Take the book of the Bible called the Song of Solomon. From start to finish, this book is about two people madly in love with each other. It talks about how we can be intimate with our spouses in ways that honor God, in ways that “communicate the character of God.” Sex was not created to be a trivial thing we do just for fun or with different people. God created sex to be experienced between a husband and wife who are in a loving marriage with each other.
God himself, the Godhead, is a family unit. God is love. God the Father, God the Son, and God the Holy Spirit, the Godhead, have an intimacy that is unmatched. Here on earth, the closest, most intimate relationship is marriage. We must love each other as God loves us. But we cannot do that if we do not love God above all else. If we love God above all else, we will begin to honor Him in all areas of our lives.