In this way he indicates the incompleteness of man or woman apart from one another and sets forth marriage as the means for them to achieve completeness. An Exclusive Relationship.
Marriage is an exclusive relationship.
One cannot relate wholeheartedly in this way to more than one person at a time. Only under certain special conditions may the principle of indissolubility be set aside. Promiscuity is likewise ruled out. Such unions are neither exclusive nor enduring. Moreover, they violate the holiness that inheres in biblical marriage.