Open marriage refers to a marriage where both spouses agree to allow sexual relationships for one or both outside the marriage, without considering this to be sexual infidelity. Extra-marital sex is often illegal in jurisdictions where adultery is illegal, regardless of whether the partner(s) have given their consent.

Is it OK to have an open marriage?

Yes, monogamy has traditionally governed the world of romantic relationships. But open marriages and open relationships are becoming more acceptable as modern couples look for alternatives to traditional coupling. It can also offer a new level of emotional and physical intimacy.