What was God's original design for marriage?
Marriage as God established it was one man for one woman, a lifelong union lasting until death. Jesus said that in the beginning it was not so regarding divorce; when God laid out the format for marriage and family, it was one man for one woman until death do them part.
Les explains that Moses granted writings of divorcement because of sin, but Jesus corrected that by pointing back to the beginning. In the beginning, when God laid out the format for marriage and family, it was one man for one woman until death do them part. Les also connects this to I Corinthians 6, where being joined to a harlot or prostitute makes a person one with that prostitute; therefore Scripture says, flee immorality.