Sexuality in the context of heterosexual marriage is not only good, but exclusively good. Only heterosexual marriage relationships can show forth the complementary design of men and women. According to the apostle Paul, one of the purposes of marriage is to show forth the mystery of Christ and the church (Eph. 5:32). If marriage can be construed as a man and a man or a woman and a woman, what is left of the glorious mystery of Christ and the church? We are left with only Christ and Christ or church and church.