Paul was obviously making sure the men of the church understood their roles as leaders. They are to be blameless, sober, understanding, oh and only have one wife. More than one causes strife, incest, rebellion, jealousy, malcontent…
D&C 49:16 says; “Wherefore it is lawful that he should have one wife, and they twain shall be one flesh, and all this that the earth might answer the end of its creation”. Ask your Mormon friend what they think of this verse in light of D&C 132:4.