Polyamorous relationships are increasingly common, quietly changing the landscape of midlife dating.
Image: Unsplash/ Lashawn Dobbs
For years, Gen Z has carried the reputation of being the generation rewriting the rules of romance, open relationships, situationships, “soft launches", and the whole chaotic love-language dictionary.
But new polyamory statistics are flipping that narrative on its head.
According to fresh data from the polyamorous dating platform "Sister Wives", it’s actually millennials and Gen X, not Gen Z, who are leading the surge in ethical non-monogamy, reshaping what commitment looks like in midlife rather than early adulthood.
Millennials make up 38.2% of users, while Gen Z is just 5.5%, making them one of the least active groups exploring polyamory online.
The most active group is people aged 35 to 44, which suggests that those with more relationship experience, not first-time daters, are leading the discussion about open relationships and modern love.
And if that sounds counterintuitive, you’re not alone. The generation everyone thought was leading isn't.
Pop culture has spent years painting Gen Z as wildly experimental in love, the generation raised on dating apps, therapy-speak and TikTok confessions about boundaries and attachment styles.
But research is telling a quieter, more nuanced story. A global survey conducted by Feeld, which included 3,310 respondents across 71 countries, found that 81% of Gen Z still fantasise about monogamous relationships.
Yes, monogamy.
Meanwhile, 75–80% of millennials, Gen X, and baby boomers reported interest in open or non-traditional relationships, revealing a shift that feels less rebellious and more reflective of life experience.
“Many young people are still navigating their first serious relationships, so adding multiple partners can feel overwhelming,” explains Christopher Alesich. “Millennials, by contrast, have more experience and are increasingly exploring non-traditional relationship types that suit them.”
That experience, not youth, may be the real driver behind the rise of ethical non-monogamy.
Midlife dating is quietly being rewritten.
The numbers paint a picture of something deeper than curiosity, midlife reinvention.
Users aged 35 to 44 dominate polyamorous dating apps, followed closely by Gen X users aged 45 to 54, who make up 20.8% of the platform’s population. Meanwhile, Gen Z ranks near the bottom, only slightly ahead of users aged 65 and older.
The evolving nature of modern relationships is being redefined by experience, maturity and changing cultural dynamics.
Image: Ario Stories /Pexels
Psychologist Terri Conley, who studies non-monogamy, believes maturity, not generational rebellion, explains the shift.
“I would suspect that it’s more of a maturation effect than a cohort effect,” she explains. “Gen Z participants may not be mature enough to consider multiple relationships at a time … given that they have relatively brief relational histories.”
Put simply: you don’t experiment with relationship structure until you’ve experienced relationships themselves.
The gender dynamics are just as revealing.
If there’s one detail that adds intrigue to the modern dating trends conversation, it’s the gender split.
Across the platform, men dominate most age groups, but Gen Z women are the outliers. Even though fewer Gen Z women are on the platform overall, they show disproportionately high interest in polyamory, closing the typical gender gap seen in older age groups.
That shift hints at something culturally significant: younger women exploring autonomy and relationship flexibility but often still prioritising emotional security. And emotional security remains the quiet centre of this conversation.
Ethical non-monogamy isn’t casual, it’s work.
There’s a persistent myth floating around social media that polyamory equals freedom without responsibility, that it’s just casual dating with better branding. Experts say that couldn’t be further from the truth.
Polyamorous individuals have multiple intentional, intimate, and loving relationships simultaneously. These relationships are serious, committed, and devoted; everyone involved is aware of each other.
That level of transparency requires something many monogamous couples already struggle with: communication. And sometimes, brutal honesty.
Comparison, insecurity and the fear of not being enough surface in ways you don’t expect. That honesty cuts through the glossy image of polyamory often seen online. Because behind the buzzwords ethical non-monogamy, open relationships, relationship anarchy lies emotional labour that many people underestimate.
Gen Z is increasingly prioritising stability and intentional, secure relationships to find calm amidst a chaotic world, economic uncertainty, and digital fatigue.
Image: Aj Collins Artistry /Pexels
While it might seem like everyone is looking for "something casual" these days, many young adults are actually moving in the opposite direction.
Sex and relationship researcher Justin Lehmiller notes that his findings mirror this trend. Compared to millennials, Gen Z was both less experienced with and less open to the idea of being in some type of sexually open relationship.
In polyamorous relationships, a lot of time and energy is needed to process emotions. Monogamy also offers the kind of stability that non-monogamous relationships may not be able to provide in some contexts.”
Gen Z is increasingly prioritising stability and intentional, secure relationships to find calm amidst a chaotic world, economic uncertainty, and digital fatigue.
This shift toward "anchored" connections over casual, high-stress dating culture is driven by a need for emotional safety, clear communication, and a rejection of the instability observed in previous generations.