O'Neill's definition of open marriage was more about opening oneself up to the world and not focusing on being a couple and nothing more. Interestingly, that is still the best marriage advice around.

Find out why one woman decided to enter an open marriage with her husband and how it has improved their relationship.

Molly Roden Winter, wife and mom of two, explains why her open marriage started after her therapist suggested making a "freedom to do" list.

An open marriage is one where both spouses consent to their partner having relationships with other people. Experts weigh in on how to define an open marriage.

I'm in an open marriage. Well, to be simultaneously more and less specific: I'm in a nonmonogamous marriage. An "open" marriage, in the nontraditional world, means that the couple may be having ...

Monk believes that a carefully negotiated and agreed open marriage “can be wonderfully affirming, creating an environment that encourages freedom of expression, stress reduction and contentment”.

There are plenty of things from the 1970s that should remain in the 1970s: disco, the polyester leisure suit, and "open" marriage. Unlike disco, there are some people who think that open marriage ...

In my 20s, I thrived in several open relationships, but now, I'm in a monogamous marriage. My open relationships taught me that I need to invest in people outside of my primary partner. I also ...

Love Letters She wants an open marriage, but she’s worried things won’t work out well Her husband said she could sleep with someone else. What could go wrong?