Once a man and a woman are married in the eyes of God, they perform certain actions that under most circumstances are considered lustful, perverted, and sinful (but just barely within the realm of tolerance so long as they're done for purposes of procreation only and no pleasure is experienced). Following this, the Lord God may choose to bless the married couple with the miracle of life, and nine months later the baby emerges from the mother's womb so that it can bask in the Glory that is Jesus and the Father.