We must now consider the plurality of wives.

Under this head there are five points of inquiry:

(1) Whether it is against the natural law to have several wives?

• (2) Whether this was ever lawful?
• (3) Whether it is against the natural law to have a concubine?
• (4) Whether it is a mortal sin to have intercourse with a concubine?
• (5) Whether it was ever lawful to have a concubine?