In what type of marriage do spouses agree in advance that extramarital relationships are acceptable?

Question

Quizplus · Accepted Answer

In an open marriage, both spouses agree in advance that extramarital relationships are acceptable. This is not the case in a consensual marriage, which simply refers to a marriage in which both parties have given their consent to the union. An ambiguous marriage and a clandestine marriage do not involve pre-agreed rules or arrangements regarding extramarital relationships.

In What Type of Marriage Do Spouses Agree in Advance