Ian Kerner is a licensed marriage and family therapist, writer and contributor on the topic of relationships for CNN. His most recent book is a guide for couples, "So Tell Me About the Last Time You Had Sex."
(CNN)Can a monogamous couple become nonmonogamous? Of course, they can — but do these couples survive and thrive? What are the pitfalls and what are the pleasures?
More and more I'm seeing couples in my practice of all ages who have always been in monogamous relationships but now are seriously thinking about opening up their relationships. They are young couples just starting out, couples with young kids and a mortgage, and empty nesters looking to find their wings.
The reasons for taking the leap vary. Often one or both partners may be feeling sexually dissatisfied in the primary relationship — it may be boredom, mismatched libidos or a desire to explore new horizons. Sometimes there's a hunger for the excitement and energy that come when people first connect with someone new. It's also possible one or both partners don't believe in monogamy. For some couples, sex has always been an issue, even though the rest of the relationship works.
No matter the reason, interest in nonmonogamy — participation in nonexclusive sexual relationships — is on the rise. In a 2020 study of 822 currently monogamous people by Kinsey Institute research fellow Justin Lehmiller, nearly one-third said that having an open relationship was their favorite sexual fantasy, and 80% wanted to act on it.
What happens if your relationship starts off as monogamous, and you or your partner change your mind? That doesn't have to doom your relationship, Lehmiller said. "Research suggests that relationship quality is actually quite similar in monogamous and consensually nonmonogamous relationships," he said. "Both relationship styles can work well — and both can fail, too."
Ethical nonmonogamy requires communication — and lots of it to avoid problems, experts say.
I believe the key to successful nonmonogamy is in one word: consensual. Known as ethical nonmonogamy, this approach is different from monogamous relationships in which partners cheat on each other. An ethically nonmonogamous relationship involves two people who identify as a couple but who are not committed to a traditional relationship, according to sexologist Yvonne Fulbright.
"They've given each other the opportunity to date or have sex with other people independently," said Fulbright, who is based in Iceland. "Often a key component in these relationships working out is that the other relationship is only sexual, not romantic or emotional. There's no deception about engaging in sex with others."