1Cor.15:45-46) sin entered the world and man was driven from the presence of the Lord. "But God who is rich in mercy" (Eph.2:1-9) provided a way back into God's presence, beginning with one man, the "last Adam," Jesus (Rom.5:12-21) who gave Himself "a sacrifice for sin." (Heb.10:1-10) with the ultimate goal of marriage. (Eph.5:25-32) Since the Cross God has been creating (building, making, forming) the Church (last Eve) to be presented to Jesus (the last Adam) according to His pattern for Marriage. (Lev.21:10-15, Matt.5:17-19, Heb.2:17; 3:1; 4:14-16; 5:1-4; 6:19-20; 7:24-28; 8:1-5; 9:1-28; 10:1-25) This is why Paul wrote, "I have espoused you to one husband, that I may present you as a chaste virgin to Christ".
Why be a chaste virgin? Is because The Lord Jesus Christ cannot be unequally yoked in marriage! (2Cor.6:14-18)