What Is Ethical Non-Monogamy? A Plain Guide
Ethical non-monogamy, often shortened to ENM, is any relationship style in which people have more than one romantic or sexual partner, with the full knowledge and consent of everyone involved. The "ethical" part is honesty: nobody is deceived. That is what separates it from cheating, and it covers a wide range of arrangements, from swinging and open relationships to polyamory.
That is the short answer. The longer one is more interesting, because ethical non-monogamy is less a single lifestyle than a family of agreements that real people shape to fit their lives.
What the words mean
Monogamy is having one partner at a time, romantically and sexually. Non-monogamy is anything other than that. On its own, non-monogamy could include secret affairs, which is why people add a qualifier.
Ethical points to the values that make it work: honesty, consent and care for everyone involved. You will also see consensual non-monogamy, or CNM, which is the term most researchers use, because it describes what is happening without making a moral claim. In daily conversation the two mean almost the same thing, and our page on consensual non-monogamy goes into the distinction.
The main forms
Ethical non-monogamy is an umbrella. Under it you will find, among others:
- Swinging. Couples who enjoy sexual experiences with other couples or singles, usually together, while keeping romance within the couple. Read more in what is swinging.
- Open relationships. A couple agrees that one or both may have sex with other people. Feelings are often kept out of it, but not always.
- Polyamory. Having, or being open to, more than one loving relationship at a time. Our beginner's guide to polyamory explains it.
- Monogamish. Mostly monogamous, with agreed exceptions, like a kiss at a party or the occasional shared adventure. See monogamish.
- Solo polyamory. People who have several relationships but do not want a live-in, couple-shaped primary partner. More in solo polyamory.
For a fuller map with the smaller variations, see types of non-monogamy, explained. The labels are useful for finding your people and your reading, but nobody is checking that you fit one perfectly.
What makes it ethical
The word does a lot of work, so here is what it usually means in practice:
- Informed consent. Everyone involved knows the basic shape of the arrangement. A new partner knows you have a spouse. Your spouse knows you are seeing someone.
- Honesty, including the awkward bits. Feelings that surprise you, plans that change, a condom that broke. Saying it is part of the deal.
- Clear agreements. Couples talk about what is fine, what is not, and what needs a check-in first. They revisit those agreements as life changes.
- Care for sexual health. Regular testing, protection and open conversations about results. A doctor or sexual health clinic is the right place for advice.
- Respect for everyone's limits. No means no, maybe means no for tonight, and nobody is pushed.
- The right to change your mind. Anyone can slow down, pause or stop.
When people talk about ENM going wrong, it is almost always one of these that slipped, not the idea itself.
What it is not
A few common misunderstandings are worth clearing up:
- It is not cheating with permission slips. The agreement is the whole point, and keeping it matters as much as in any monogamous relationship.
- It is not a fix for a struggling relationship. Opening up tends to magnify what is already there, good and bad.
- It is not polygamy. Polygamy means marriage to more than one person, and bigamy is illegal across the US, Canada, the UK and the EU. Relationships between consenting adults are not. This is general information, not legal advice.
- It is not a free-for-all. Most people in ethical non-monogamy have more conversations about boundaries than their monogamous friends ever do.
How common is it?
More common than many people assume. A 2017 study by Haupert and colleagues found that about one in five single adults in the US had been in a consensually non-monogamous relationship at some point in their lives. And research by Conley and colleagues has reported similar relationship satisfaction among people in consensually non-monogamous and monogamous relationships.
That does not mean it suits everyone. It means that, for people who choose it with care, it can be as happy as any other way of loving. We look at the evidence more closely in does ethical non-monogamy work.
Where the ideas come from
Many people's first serious read on the subject is The Ethical Slut by Dossie Easton and Janet W. Hardy, first published in 1997, with a third edition in 2017. Its big idea is that you can have more than one partner and still be a kind, honest and responsible person. Our summary of The Ethical Slut covers the key points. Tristan Taormino's Opening Up, from 2008, is a practical guide built on interviews with people living all sorts of open arrangements.
Is it right for you?
A few honest questions help more than any quiz:
- What do I actually want: variety, closeness with more people, adventure as a couple, or independence?
- Can I talk openly about desire, fear and jealousy, and listen when my partner does?
- Would I be comfortable with the same freedom I am asking for?
- Am I asking because things are good, or because I am hoping this fixes something?
Take Laura and Peter, who spent a whole winter reading and talking before they did anything at all. They realised they wanted shared adventures, not separate dating lives, and that knowledge saved them a lot of guessing. Going slowly is almost never a mistake.
A circle to explore with
Ethical non-monogamy is easier with friends who already understand it. If you are a couple or a single woman in North America or Europe and you would like to meet like-minded people in a relaxed way, usually over a coffee or a dinner first, you can join Rope & Candy. It is free, invite-only, and there is never any pressure to do more than say hello.
Questions people ask
What does ethical non-monogamy mean?
It means having more than one romantic or sexual partner with the full knowledge and agreement of everyone involved. The ethical part is honesty and consent. Swinging, open relationships and polyamory all fall under it.
Is ethical non-monogamy the same as cheating?
No. Cheating breaks an agreement and depends on secrecy. Ethical non-monogamy is built on an agreement that everyone knows about, and on keeping it, so the difference is honesty rather than the number of partners.
What is the difference between ENM and CNM?
In everyday use they mean almost the same thing. ENM, ethical non-monogamy, is the term most people use, while CNM, consensual non-monogamy, is the term researchers tend to prefer because it describes consent without judging ethics.
How do I know if ethical non-monogamy is right for me?
Ask yourself what you actually want, whether you can talk openly about desire and jealousy, and whether you would be comfortable with the same freedom for a partner. Reading, talking and going slowly will tell you more than any quiz.