The popular view in culture is that sex is merely a physical act and that our sex lives are no bodies business but our own. Paul contradicts both these assumptions with his teaching in this section. First he makes it clear that not only is sex a physical act, it’s also a spiritual one. Second he makes it clear that our sex lives matter to God because, as Christian, our bodies are a part of His body, the temple of the Holy Spirit, and were purchased by the blood of Christ.