Open relationships, polyamory & other non-monogamy: an overview

In consensual non-monogamy, partners agree together on what is and isn’t OK. The agreement is the foundation, not an afterthought.

Agreeing because you are scared of losing someone, or because you feel pushed, is not free consent. Real consent can also be changed or taken back.

People in agreed non-monogamy usually talk openly about their other relationships and how they feel. How much detail people share is part of the agreement.

Honesty here is less about “telling everything” and more about not hiding things your partners have asked to know.

Agreements might cover time, privacy, sexual health, who partners can date, or how quickly to share news. They are different for every relationship.

Many people check in on their agreements regularly, because feelings and lives change. The guide “Opening a relationship or swinging: agreements, boundaries & feelings” goes deeper.

Some couples are committed and mostly exclusive, but agree on occasional, limited exceptions. Researchers sometimes call this “monogamish”.

In a 2025 review, people in monogamish relationships reported slightly higher relationship satisfaction than monogamous people, though the difference was small.

In an open relationship, partners can have sexual relationships with other people. Falling in love with someone else is usually not part of the agreement, though friendships may be.

The couple’s own bond usually stays central. Each couple decides its own limits.

Polyamory means pursuing romantic love and intimacy with more than one partner, with everyone’s knowledge and agreement.

Some shapes polyamory can take

• A “V”: one person with two partners who aren’t partners with each other
• Mono-poly: one partner is polyamorous and the other is monogamous
• Polyfidelity: a closed group that doesn’t add new partners
• Triads and quads: three or four people in shared relationships

A partner’s other partner is often called a “metamour”. The guide “Polyamory & your mental health” covers feelings, time and communication.

In hierarchical polyamory, one partner is “primary”, often sharing a home or money. Others are “secondary”. In non-hierarchical polyamory, no relationship is ranked above another.

In a study of 1,308 polyamorous people, primary relationships were rated higher on commitment, investment and acceptance by others than secondary ones.

Relationship anarchy is a philosophy more than a structure. People who follow it avoid ranking relationships (for example, putting romance above friendship) and shape each connection by mutual agreement.

It values freedom, trust and honesty. It is often, but not always, non-monogamous.

In swinging, a committed couple takes part in sexual experiences with other people, usually together and often within a social community. Romantic involvement with others is usually not part of it.

Swingers are sometimes called “in the lifestyle”. In a 2025 review, swingers and polyamorous people reported slightly higher sexual satisfaction than monogamous people, though the difference was small.

Usually includes

• Agreements that everyone can question or change
• Honest talk about feelings, including hard ones
• Openness about other partners
• Shared care for health and safety

One study found that people in openly non-monogamous relationships were more likely to take sexual health precautions, get tested regularly, and talk about safer sex with new partners than people who were cheating.

Cheating can happen in monogamous and non-monogamous relationships alike. In a non-monogamous relationship, breaking the agreed rules or hiding a relationship is still a betrayal.

The “Cheating & infidelity” guide covers discovering betrayal, deciding what to do, and healing.

In a study of 1,093 polyamorous people, both relationships were rated as satisfying. Having needs met by one partner barely affected satisfaction with the other.

The researchers noted that expecting one partner to meet every need may be unrealistic for anyone, monogamous or not.

One study found that monogamous people reported more distress than non-monogamous people when imagining a partner with someone else.

Researchers point out that jealousy likely happens in every type of relationship. It is a challenge to work with, not proof that a relationship can’t work.

Many studies use volunteers from Western countries, who may be happier with their relationships than average. More research is still needed.

Some people try non-monogamy and find it isn’t for them. In one national study, people who had tried polyamory often mentioned difficult emotions or possessiveness as challenges.

Research has found similar relationship quality and commitment in monogamous and consensually non-monogamous relationships on average.

Commitment shows up in how people treat each other: keeping promises, showing up, and caring for each other over time.

Cheating breaks trust in secret. Consensual non-monogamy is agreed openly. Researchers treat them as clearly different things.

In a study of polyamorous people, good things in one relationship tended to carry over to the other, rather than one relationship making up for a weak one.

Polyamory, in particular, is about loving relationships with more than one person. People in it describe care, emotional support and shared lives.

In national U.S. samples, experience with consensual non-monogamy was similar across age, education, income, religion, region, political views and race.

One study found that openly non-monogamous people were more likely than people who were cheating to take precautions and get tested regularly.

For anyone with more than one partner, regular testing at a clinic or with your clinical provider is part of caring for yourself and others.

• Am I curious for myself, or trying to please someone?
• Do I have time and energy for more than one relationship?
• How do I feel when I imagine a partner with someone else?
• What do I need to feel safe and loved?
• What draws me to this idea, and what worries me?

• Both or all partners are genuinely interested
• Feeling secure enough to talk about hard feelings
• Shared values about honesty and care
• Willingness to go slowly and check in

• Agreeing out of fear of being left
• Covering up an affair that already happened
• Hoping it will fix deep problems at home
• One partner deciding for both

• “Are you happy? That’s what I care about.”
• “Thank you for telling me.”
• “What words do you use for your relationships?”
• “Would you like me to keep this private?”

• Asking about their sex life
• Predicting that it will end badly
• Sharing their news without permission
• Treating their partners as less important

Invite partners to events when it feels right, learn their names, and treat their relationships as real. Being welcomed by the people around them helps everyone feel less alone.

The Kink and Polyamory Aware Professionals directory (kapprofessionals.org), run by the National Coalition for Sexual Freedom, lists professionals who say they are informed about non-monogamy. Listings are not screened, so ask questions first.

The American Association of Sexuality Educators, Counselors and Therapists (AASECT) has a referral directory of certified sex therapists and counselors at aasect.org.

The guide “Polyamory & your mental health” has questions to ask a new therapist.

The National Domestic Violence Hotline offers free, confidential support 24/7. Call 1-800-799-7233 or text START to 88788, or chat at thehotline.org.

For teens and young adults, love is respect: call 1-866-331-9474 or text LOVEIS to 22522.

If you feel overwhelmed, hopeless or are thinking about suicide, call or text 988 (U.S.) to reach the 988 Suicide & Crisis Lifeline. It’s free, confidential and open 24/7.

You don’t have to explain your relationship to get help. Counselors are there for whatever you’re going through.

Find A Helpline (findahelpline.com) lists free, confidential helplines by country and topic. In an emergency, call your local emergency number.