Matthew 19:4-6 "Haven't you read," he replied, "that at the beginning the Creator 'made them male and female,'and said, 'For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh'? So they are no longer two, but one. Therefore what God has joined together, let man not separate." 1 Corinthians 6:16 Do you not know that he who unites himself with a prostitute is one with her in body? For it is said, "The two will become one flesh." There you have it, the Bible says it is not out of line with God's teachings for a couple to have marital relations before they get married. The marrriage is the 'union', not the ceremony.