We must now consider the plurality of wives. Under this head there are five points of inquiry:

A[1] Whether it is against the natural law to have several wives?

A[2] Whether this was ever lawful?

A[3] Whether it is against the natural law to have a concubine?

A[4] Whether it is a mortal sin to have intercourse with a concubine?

A[5] Whether it was ever lawful to have a concubine?