“Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband.”
King James Version (KJV)
7:2 Yet, when it is needful, in order to avoid fornication, let every man have his own wife. His own - For Christianity allows no polygamy.
1Co 7:2 [To avoid] fornication. To prevent this sin, and the temptations to it in an unmarried state, especially in a vicious community, it was best for each sex that they be married; the normal condition of the sexes.