It is this that Jesus is addressing when he denies divorce to the all-powerful Jewish male of the first century. There is no discussion of a woman divorcing her husband here. And Jesus is coming to the defense of the defenseless women, just as the bishops in Africa do in their defense of polygamy. They are not laying down rules for everywhere and for all time. They are, like Jesus, saying that insistence upon talking about rights and permissions misses God's point.
Human relationships are about duty and opportunity.
They are about rapture and love and the possibility that every human being can find an end to his or her aloneness in union with another. What God joins together let no one put asunder. The creation story says that everything is supposed to fit together neatly. But in real life, we don't see it happening that way. And here is the one we look to.