3257 means to love your wife deeply, but what does 10 13 mean?

When a husband loves his wife, he loves his own body, himself and "his own body". Marriage requires two people to truly become one, and two people to become one; So when a man loves his wife, he actually loves himself. Remind us that God's will for his people is monogamy. Although God allowed polygamy in the Old Testament, God never approved of such a thing.