This is a provocation, but a researched one. The claim that lifestyle couples communicate better than most married couples is not editorial opinion. It's a finding that appears consistently across the literature on consensual non-monogamy, and understanding why it's true is more useful than simply noting that it is.
What the research actually says
A 2012 study published in the Journal of Sexual Medicine examining people in consensually non-monogamous relationships found that participants reported significantly higher levels of trust and communication quality than would be expected from the general population. A 2019 study in Frontiers in Psychology found similar results, with CNM participants reporting more explicit communication about sexual needs and relationship boundaries than matched monogamous comparison groups.
The researchers' interpretation is not that non-monogamy causes good communication. It's that good communication is a prerequisite for non-monogamy that works. The selection effect matters: couples who cannot communicate well tend to exit the lifestyle quickly, because the lifestyle makes poor communication untenable in a way that conventional monogamy sometimes doesn't, at least not immediately.
The result is that the population of couples who remain active in the lifestyle over time is disproportionately composed of people who are good communicators. The average communication quality of long-term lifestyle participants is therefore genuinely higher than the general population average.
What the lifestyle does to communication
Beyond selection, the lifestyle actively develops communication skills in ways that most relationship contexts don't. Entering the lifestyle requires explicit conversations that most couples have never had. What do you actually want? What are you worried about? What will you do if this? What does it mean if that? These conversations cannot be replaced by implication, assumption, or the kind of ambient understanding that develops in long-term relationships through observation rather than explicit exchange.
The habit of explicit communication, once established, tends to persist and to generalise. Couples who've learned to talk specifically about desire, jealousy, and boundaries in a lifestyle context find those skills available for other difficult conversations. The couple who can discuss a complicated lifestyle situation without it becoming a crisis tends to also be the couple who can discuss a financial disagreement or a parenting difference without it becoming a crisis.
The specific communication skills the lifestyle develops
Saying what you want without hedging it. Most people in long-term relationships have become skilled at implying what they want rather than stating it directly, partly out of consideration and partly to preserve plausible deniability if the answer is no. The lifestyle makes direct statement of desire necessary rather than optional.
Hearing difficult things without becoming defensive. The conversations the lifestyle requires sometimes include things that are uncomfortable: a partner expressing a preference for someone they've met, a feeling of jealousy that needs naming, something that happened that didn't feel right. Being able to receive this kind of information without treating it as an attack on the relationship is a genuine skill that lifestyle couples develop through practice.
Saying no clearly and accepting no graciously. Both of these are harder than they sound in intimate relationships. The lifestyle requires both, regularly, and the practice produces couples who are considerably better at the full negotiation of consent and preference than most.
The implication for any relationship
The communication skills that make the lifestyle work well are not unique to the lifestyle. They're the same skills that determine whether any long-term relationship deepens or stagnates. The lifestyle doesn't create those skills from nowhere. It creates the conditions that make developing them necessary rather than merely desirable.
The question this raises for couples who have no interest in swinging is what conditions in their relationship are making those conversations necessary. In the absence of external pressure, most couples default to the comfortable assumption that their partner knows what they want and thinks what they think. They don't. They just haven't been asked recently.
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