What does 1 Corinthians 7:4 mean?
Paul is revealing God's will about sex within marriage. He has rejected the idea that married Christians should abstain from sex. Early heresies, such as Gnosticism, claimed that the body was evil and sex should be avoided, even in marriage. In fact, Scripture says the opposite is true because of the temptation to participate in damaging sexual sin.In the previous verse, Paul wrote that husbands and wives must both give sex to each other, translated in various Bibles as "conjugal rights" or "marital duty." Now Paul explains why this is true, using the language of authority. Neither wives nor husbands are entirely independent over their own bodies when it comes to sex. Instead, the wife has authority over the husband's body and vice versa.
The Bible's teaching on this subject runs counter to both the culture of Paul's day and to our own. This is a uniquely Christian idea for several reasons.
First, in many cultures then and now, a wife's body was thought to be the explicit property of her husband, but categorically not the other way around. In some cases, cultures essentially considered "male adultery" non-existent, requiring fidelity only of the woman. In Christian teaching, however, both parties in marriage are so closely connected, as if one person (Genesis 2:24), that they have mutual authority over each other's bodies. This is the opposite of male dominance of women. This specific verse focuses on that idea of mutual submission in one specific area of marriage.
Second, especially in modern times and places, culture often recoils at the suggestion that a person does not have absolute, unrestricted autonomy over his or her own body. Christian teaching, though, is clear about this idea. Paul wrote in the previous chapter that, as Christians, we do not own our bodies, because God purchased us from sin and death with the blood of Jesus (2 Corinthians 5:19–20; Ephesians 1:7; Galatians 3:13). The two primary expressions of this are in avoidance of sin and in the mutual expression of sexuality in marriage.
Marriage is meant to be a picture of the relationship between Christ and those who have been redeemed in the church. In that picture, both the redeemed husband and redeemed wife surrender their right to exercise authority over their own bodies—in this area specifically—as part of their marriage commitment to become one.