Swinging, polyamory or an open relationship: what's the difference?

“Are you swingers?” and “do you have an open relationship?” sound like the same question, but they're not. Swinging, polyamory and an open relationship are three different forms of non-monogamy, each with their own agreements about what is and isn't part of it. Mixing them up misses the point they all share: it's not the label that matters, but the clear agreements you make with your partner(s) about it. Wrong assumptions also create awkward situations, for example when someone assumes “open relationship” automatically means “sex with anyone, no discussion needed”, while most agreements are actually stricter and more specific than outsiders think.

What is an open relationship?

Swinging and polyamory are both forms of an open relationship, but not the other way around: some couples make different agreements, for example allowing only physical contact without emotional involvement, or the reverse.

In practice, there are even more variants that don't fit neatly under swinging or polyamory. Some couples follow a “don't ask, don't tell” agreement: contact with others is fine, but details aren't shared. Others call themselves “monogamish”, essentially monogamous but with occasional, pre-discussed exceptions. Others again decide each situation as it comes, without fixed rules in advance. Internationally, the whole group is often summed up under the term ethical non-monogamy (ENM): non-exclusive, as long as it's honest and happens with mutual consent.

The opposite of an open relationship is a vanilla, monogamous relationship: two partners, no room for others, sexually or romantically. An open relationship deliberately chooses a variation on that, with agreements as diverse as the people making them.

What is swinging?

The emphasis is on the word “together”: your partner is there, or knows the details, and the agreement is fundamentally about sexual contact, not a second romantic relationship.

Within swinging, a distinction is often made between “soft swap” and “full swap”. With soft swap, contact with others stays limited, for example to touching or watching together, without full sex. With full swap, there is full sexual contact with the other partner(s). Which variant a couple chooses, and whether that's renegotiated each time, varies a lot per couple.

In practice, swinging often happens in a shared setting, such as an evening with another couple, a lifestyle club, or a private event, and the romantic relationship between the original partners stays the centre of it. You can read more about the exact definition and origin of the term in our glossary.

What is polyamory?

Where swinging is mainly about shared sexual contact, polyamory is about multiple full, romantic relationships side by side, each with its own emotional involvement.

Different structures exist within polyamory too. In hierarchical polyamory, there's a “primary” relationship that takes priority, for example a couple who live together and also have separate relationships. In non-hierarchical polyamory, also called relationship anarchy, no relationship is deliberately placed above another: every connection gets equal room to develop. A network of people connected this way is sometimes called a “polycule”, a blend of polyamory and molecule.

In practice, that can look very different: a couple who bring in a third partner together (a throuple), two people who each have separate relationships alongside their relationship with each other, or someone with multiple partners who barely know each other. The partner of your partner, with whom you have no romantic relationship yourself, is called a metamour in polyamory terms.

What's the difference between swinging and polyamory?

The short answer:

The table below sets out the main differences more precisely.

Where do swinging and polyamory overlap?

In practice, the line isn't always as sharp as the table above suggests. Some couples who start out swinging develop feelings for someone they meet that way, and grow into a polyamorous situation, a shift sometimes called “swolly” in the swinger world, a mix of swinging and polyamory. Conversely, some polyamorous people deliberately choose to keep certain relationships purely sexual, without the romantic depth that typically characterises polyamory.

One feeling shows up in both forms: compersion, genuine joy because your partner is having a good experience with someone else. Where jealousy is often taken for granted in monogamous relationships, compersion is, for many people in non-monogamous relationships, exactly what they aim for, or at least a sign that the agreements feel right for everyone. That doesn't mean jealousy never happens, only that in both forms it's consciously dealt with rather than left unspoken.

The roles people take on within these forms overlap too. A unicorn, usually a single bisexual woman who joins an existing couple, can appear in both a swinging context and a polyamorous one, depending on whether the involvement stays purely sexual or grows into its own relationship with one or both partners.

Is an open relationship something for me?

That means you keep checking in with each other beforehand and along the way, and that last month's “yes” isn't automatically today's “yes”.

A few questions that help clarify what fits for you: is it about shared experiences with your partner, or about room for your own, separate relationships? How do you handle jealousy, and what do you need to feel safe? And maybe the most important one: can you talk openly about this with your partner, without it immediately turning into a confrontation?

Don't think of it as a switch you flip all at once, but as a conversation you keep having. Start small: first talk about what draws you to the idea, without making concrete agreements right away. Then, if you both want to move forward, choose together a form that fits you, with clear boundaries. Agree on how and when you'll check back in with each other to see if the agreements still feel right, because what sounds logical on paper sometimes feels different in practice. And remember that “no” or “not yet” is a valid answer at any time, even after you agreed to something before.

Further reading