We learn from Paul in Ephesians 5:31-32 that, from the beginning, manhood and womanhood existed to represent or dramatize God’s relation to His people and then Christ’s relation to His bride, the church. In this drama, the man represents God or Christ and is to love his wife as Christ loved the church. The woman represents God’s people or the church. And sexual union in the covenant of marriage represents pure, undefiled, intense heart-worship. That is, God means for the beauty of worship to be dramatized in the right ordering of our sexual lives.
John Piper