In Theological Sexuality: Gender, Part 1, we saw that the male and female distinction has its foundation in the very nature of God. In Theological Sexuality: Gender, Part 2, we saw that the male and female distinction also has its foundation in the very nature of Christ and His church. In Theological Sexuality and the Sacraments, we saw that just as Christians demonstrate their covenant union with Christ through the sacraments of Baptism and the Lord’s Supper, so too humans demonstrate their covenant union with their spouses through sexuality. All of which leads to the question of what this teaches us deviances from Biblical sexuality.
The answers, once the above three foundations are understood, are quite simple. Biblical sexuality is two persons, one male and one female, united in covenant marital oneness, demonstrating that intrinsic covenantal oneness physically. It is quite easy then to address the deviances in our culture.
Homosexuality is out of accord with Biblical Sexuality because it involves two males or two females, destroying the foundation of God’s nature of plurality and the nature of Christ and the Church. It is not Christ in covenant with Christ or the Church in covenant with the Church, but Christ is covenant with the Church. God is not three sons, three fathers, or three Holy Spirits, but Father, Son and Holy Spirit. Thus, human sexuality reflects a unity of plurality.
Adultery is wrong because sexuality proclaims a covenant oneness between two individuals who are not covenantally one. Instead, these two individuals have broken their marriage covenants with their original spouses by declaring themselves one with someone else. Christ does not abandon the church to form a covenant with someone else. In the same way, not just anyone can participate in the covenant signs of baptism and the Lord’s supper. The covenant of grace is only between Christ and the Church.
Pornography is a lie, pure and simple. Those viewing pornography are enjoying the benefits of the covenant when in fact their is none. Pornography is nearly identical to prostitution in this regard. It is a sham of a covenant. Christ does not simply pretend to have a covenant relationship with the church or vice versa. To put it even more graphically, Christ does not simply look at pictures of the Church or fantasize about having a covenant relationship with the Church. There truly is a covenant which He died to create. Those engaged in sexual activity are declaring themselves covenantally one, but when pornography is involved, they are not actually one!
Auto-eroticism is wrong because Biblical sexuality is for husband and wife as a reflection of Christ and the church. The church does not participate in Baptism or the Lord’s Supper without Christ present! Christ does not engage the signs of the covenant without the church. It is not Christ by Himself or the church by itself, but Christ in covenant relation with the Church. Christ is a person of the Trinity, not one by Himself. Again, this deviance destroys the picture of plurality of Biblical Sexuality.
The list could go on and on, but the pattern is quite evident. Biblical sexuality is for two persons, one male and one female, in covenant union with one another, as a picture of Christ and the Church and the plurality of the Godhead. All else is a perversion and deviance from God’s created purpose.