For many of us, the urge to couple up is a strong one. It might even be programmed into our DNAGenetic variation in the vasopressin receptor 1a gene (AVPRI1A) associates with pair-bonding behavior in humans. Walum, H., Westberg, L., Henningsson, S., et al. Proceedings of the National Academy of Sciences. Neuroscience, September 16; 105(37): 14153–14156The Neurobiology of Pair Bonding: Insights from a Socially Monogamous Rodent. Young, K., Gobrogge, K., Liu, Y., et al. Front Neuroendocrinology, 2011 January;32(1): 53-69. But does love mean never dating or having sex with other people?

Several years ago, I decided to challenge the idea that the only way to a loving, committed relationship was to be monogamous. My then-boyfriend and I decided to try an open relationship. We were committed to each other, referred to each other as boyfriend and girlfriend, and were both allowed to date and be physically intimate with other people. We eventually broke up (for various reasons, most of which weren’t related to our openness), but since then I’ve remained interested in rethinking relationships — and it turns out I’m not alone.

Nonmonoga-me — Current Trends

Open Relationships

Estimates suggest there are more than half a million openly polyamorous families in the U.S., and in 2010, an estimated eight million couples were practicing some form of nonmonogamyNon-monogamy: risk factor for STI transmission and acquisition and determinant of STI spread in populations. Aral, SO, Leichliter, JS. Division of Sexually Transmitted Disease, The National Center for HIV/AIDS, Viral Hepatitis, STD and TB Prevention, Centers for Disease Control and Prevention. Sexually Transmitted Infections, 2010 Dec;86 Suppl 3:iii29-36. Even among married couples, open relationships can be successful; some studies suggest they’re common in gay marriagesNon-Monogamy and Sexual Relationship Quality Among Same-Sex Male Couples. Parsons, JT, Starks, TJ, Gamarel, KE, et al. Journal of Family Psychology, 2012 Aug 20.

For today’s 20- and 30-somethings, these trends are meaningful. More than 40 percent of millenials think marriage is “becoming obsolete” (compared to 43 percent of Gen Xers, 35 percent of Baby Boomers, and 32 percent of people aged 65-plus). And almost half of millenials say they view changes in family structures positively, compared to only a quarter of elderly respondents. In other words, monogamy — though a perfectly viable choice — doesn’t work for everyone.

It certainly wasn’t working for me. Blame it on a couple unhealthy relationships in my youth: For whatever reason, in my mind “monogamy” had come to be associated with possessiveness, jealousy, and claustrophobia — not quite what one desires from everlasting love. I wanted to care about someone without feeling owned by them, and I wanted that someone to feel the same way. Add to that the fact that I’d been single for a while (after having been in a monogamous relationship for even longer) and — I’m woman enough to admit it — wasn’t ready to give up the freedom to flirt with strangers. Beyond that, I wasn’t sure what I wanted, exactly, but I knew I didn’t want to feel suffocated by a partner. So when I started dating… let’s call him “Bryce”… I geared myself up for hurt feelings, got over my own awkwardness, and broached it: Have you ever thought about having an open relationship?

Open relationships tend to fall into two general categories, says Greatist Expert and sex counselor Ian Kerner: Couples might negotiate a nonmonogamous arrangement like the one I had with Bryce, in which each individual has the freedom to date and/or have sex with people outside the relationship. Or couples will choose to swing, adventuring outside their monogamous relationship as a unit (having sex with other people together, as in a three-or-more-some). But these categories are pretty fluid, and they shift depending on a given couple’s needs and boundariesAdult attachment and patterns of extradyadic involvement. Allen, E.S. and Baucom, D.H. Department of Psychology, University of North Carolina—Chapel Hill. Family Process, 2004 Dec;43(4):467-88.

Monogamy = Monotony? — Why Couples Go Rogue

The tricky thing about relationships is they’re all different, so there’s no “one reason” why people decide to explore alternative relationship modelsAdult attachment and patterns of extradyadic involvement. Allen, ES and Baucom, DH. Department of Psychology, University of North Carolina—Chapel Hill. Family Process, 2004 Dec;43(4):467-88.

Still, there are a wide range of theories about why monogamy hasn’t proved universally satisfying. Some experts say it has roots in genetics: About 80 percent of primates are polygamous, and similar estimates apply to human hunter-gatherer societies. (Still, it’s not useful to get caught up in the “is it natural” argument, says Kerner: Variation is what’s natural, more so than monogamy or nonmonogamy.)

Other research suggests different people have different needs for a satisfying relationshipSexual satisfaction and relationship happiness in midlife and older couples in five countries. Heiman, JR, Long, JS, Smith, SN, et al. The Kinsey Institute for Research in Sex, Gender, and Reproduction, Indiana University. Archives of Sexual Behavior, 2011 Aug;40(4):741-53Intimacy and marital satisfaction in spouses. Greeff, AP, Malherbe, HL. Department of Psychology, University of Stellenbosch, South Africa. Journal of Sex and Marital Therapy, 2001 May-Jun;27(3):247-57. In The Monogamy Gap, Eric Anderson suggests open relationships allow partners to meet their respective needs without demanding more than one partner can give. There’s also a cultural component: Fidelity stats vary widely among cultures, and evidence suggests countries with more permissive attitudes toward sex also have longer-lasting marriages. In Nordic countries, many married couples openly discuss “parallel relationships” — ranging from drawn-out affairs to holiday flings — with their partners, yet marriage remains a respected institution. Then again, sex advice columnist Dan Savage says nonmonogamy might just come down to plain old boredom.

In short, there are as many reasons to be nonmonogamous as there are nonmonogamous people — and therein lies a bit of a problem. Even if a couple agrees to be nonmonogamous, their reasons for doing so might be in conflict. In my case, I wanted to be in a nonmonogamous relationship because I wanted to challenge social assumptions about love; Bryce wanted to be in a nonmonogamous relationship because I wanted to be in one, and he wanted to be with me. Perhaps not surprisingly, this stirred up conflict between us when I actually started seeing other people. While I was fine when Bryce made out with a mutual friend, he couldn’t stomach the thought of me doing the same. This eventually led to resentment on both sides and jealousy on his — and suddenly I found myself back in a claustrophobic relationship, arguing about who belonged to whom.

Should You Put a Ring on It? — New Directions

Not surprisingly, the green-eyed monster is a common challenge for nonmonogamous partners across the board, regardless of gender or sexualitySexual and romantic jealousy in heterosexual and homosexual adults. Harris, CR. San Diego Department of Psychology, University of California, La Jolla. Psychological Science, 2002 Jan;13(1):7-12Emotional responses to sexual and emotional infidelity: constants and differences across genders, samples, and methods. Sabini, J., Green, MC. Department of Psychology, University of Pennsylvania, Philadelphia. Personal and Social Psychology Bulletin, 2004 Nov;30(11):1375-88Emotional and sexual jealousy as a function of sex and sexual orientation in a Brazilian sample. De Souza, AA, Verderane, MP, Taira, JT, et al. University of Sao Paulo, Brazil. Psychological Reports, 2006 Apr;98(2):529-35. The best way to deal? Honesty. In numerous studies, open communication is the prime driver of relationship satisfaction (this is true in any relationship), and the best coping mechanism for jealousyAn investigation of unmet intimacy needs in marital relationships. Kirby, JS, Baucom, DH, Peterman, MA. Department of Psychology, University of North Carolina—Chapel Hill. Journal of Marital and Family Therapy, 2005 Oct;31(4):313-25Truth, lies, and intimacy: an attachment perspective. Cassidy, J. Department of Psychology, University of Maryland. Attachment and Human Development, 2001 Sep;3(2):121-55Swings and roundabouts: management of jealousy in heterosexual swinging couples. De Visser, R., McDonald, D. Department of Psychology, University of Sussex. British Journal of Social Psychology, 2007 Jun;46(Pt 2):459-76Gay monogamy: I love you but I can’t have sex with only you. Bonello, K., Cross, MC. Department of Psychology, City University, London. Journal of Homosexuality, 2010;57(1):117-39. For couples venturing into opendom, it’s important for partners to communicate their needs and work out an agreement in advance of any rendezvous.

In retrospect, I should have been more honest with myself, and acknowledged that (regardless of what he said) Bryce didn’t really want to be nonmonogamous; it would have spared us both some heartache. It’s easy to be attracted to nonmonogamy’s sexier side, but it actually requires incredibly high levels of trust, communication, openness, and intimacy with your primary partner — meaning that just like monogamy, open relationships can be pretty stressful, and they’re certainly not for everyone. In other words, nonmonogamy is by no means a ticket out of relationship problems, and it might actually be a source of them. It can also be thrilling, rewarding, and enlightening.

No matter what, say experts, whether a couple decides to be open or monogamous should be a matter of choice. “When there is no stigma to having an open sexual relationship,” writes Anderson, “men and women will begin to be more honest about what they want … and how they desire to achieve it.”

As for me, these days I’m a one-man kinda gal — which I learned by being open.