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A 37-year-old woman recently shared on Reddit that her boyfriend of 3 years had pushed her to open their relationship 6 months earlier.
The arrangement was supposed to be mutual.
They would both date other people.
They would not discuss the details.
She started getting matches within days.
He got nothing for weeks.
By month three, he was checking her phone, accusing her of cheating, and demanding they close the relationship he had personally opened.
The post crossed 25,000 upvotes, and thousands of comments piled in, almost all of them on her side.
The story is striking, but the more interesting part is how predictable it was.
What this couple ran into is not bad luck or one partner’s emotional failure.
It is a structural problem that lies at the heart of almost every open relationship in the United States right now.
The numbers explain it.
The dating apps amplify it.
Moreover, most therapists who work in this space have been quietly warning about it for years.
This is the essay nobody else seems to be writing.
Open Relationships Are Not As Rare As Most People Think
The first thing worth understanding is just how mainstream non-monogamy has become in the United States.
Research published in the Journal of Sex and Marital Therapy in 2017, drawing on two national samples of single Americans, found that roughly 1 in 5 adults has engaged in some form of consensual non-monogamy at some point in their life.
To put that figure in perspective, the researchers noted that prior engagement in consensual nonmonogamy is roughly as common as owning a cat or speaking a language other than English at home.
More recent nationally representative work has refined the picture.
A 2019 Wheatley Institution and Brigham Young University survey of 2,000 American adults found that about 3 percent were currently in a consensually non monogamous relationship, and 12 percent had ever been in one.
A separate analysis cited in a 2024 Slate piece, drawing on studies from 2012 and 2015, estimated that the rate of active non-monogamy is between 2.5 and 4 percent among those currently in a relationship.
In other words, at any given moment, somewhere between 2 and 5 percent of partnered American adults are not strictly monogamous by mutual agreement.
Across a lifetime, the share who have tried it at least once is closer to 1 in 5.
That is millions of people.
Moreover, the curiosity keeps climbing.
Internet searches for polyamory have risen sharply over the past decade, according to research from Chapman University and The Kinsey Institute.
The mainstream conversation has caught up.
Celebrities discuss open marriages on talk shows.
Major bookstores stock guides to ethical non-monogamy.
Dating apps like Feeld are built entirely around the category, and platforms like Hinge and Tinder have added relationship type filters to their profiles.
This is no longer the fringe.
However, cultural acceptance has outpaced an uncomfortable reality.
The Hidden Gender Gap Inside Every Open Relationship
The story most people tell themselves before entering a relationship is that both partners will find outside connections at roughly the same rate.
The reality is the opposite.
The structure of American dating in 2026 is severely lopsided along gender lines, and that imbalance is imported into every open arrangement the moment it begins.
The numbers are difficult to argue with.
Globally, around 62 percent of dating app users are male.
On Tinder, the ratio is closer to 3 men for every 1 woman.
Data on swiping behavior shows that women swipe right on roughly 5 to 8 percent of profiles, while men swipe right on 40 to 46 percent.
The average male Tinder user gets 1 match per 130-140 swipes.
The average female user gets one match per 10 swipes.
In 2025, according to the Hily State of Dating report, 51 percent of American men had no dates at all that year.
Not a few. Zero.
A 2022 Pew Research survey, frequently cited in dating research, found that 63 percent of men under 30 are now single, compared to 34 percent of women in the same age group.
Bumble lost 16 percent of its paying users in the most recent reporting period.
Match Group has seen its subscriber count slide quarter after quarter.
Now layer this on top of an open relationship.
The man in the couple opens dating apps, assuming his market value will translate.
It rarely does.
His girlfriend, especially if she is in her thirties and presents reasonably well, suddenly has more inbound interest than she has had in years.
The gap between the two partners is not gradual.
It is immediate, wide, and humiliating for whichever partner is on the wrong side.
In heterosexual couples, that partner is almost always the man.
Therapists who specialize in non-monogamy have a clinical name for this dynamic.
They call it the unequal interest problem.
Moreover, in their case notes, it shows up so often that it is treated as the default outcome, not the exception.
Why So Many Couples Open Anyway
If the structural problem is this predictable, the obvious question is: why do so many American couples keep trying?
Three reasons keep appearing in research and clinical observation.
The first is the rising age of marriage.
The median American now marries in their early thirties.
By that point, many adults have already lived through long-term relationships that ended.
They are skeptical of the cultural promise that one person can meet every emotional, sexual, intellectual, and social need for the rest of their lives.
Opening a relationship feels like an honest acknowledgment of that skepticism.
The second is the influence of online culture.
Open relationships, situationships, and ethically non monogamous arrangements are discussed openly on TikTok, Instagram, Substack, and major podcasts.
What used to be private experimentation is now publicly documented and debated.
The social cost of admitting curiosity has dropped sharply.
The Sexual Health Alliance, citing the most recent Kinsey Institute and Match Singles in America Study, which covered more than 5,000 American adults, noted that the 2025 dating landscape is defined by a much wider tolerance for unconventional structures, especially among Gen Z and Millennials.
The third is a real shift in what younger Americans want from a partnership.
Surveys consistently show that adults under 40 place greater value on personal growth, individual autonomy, and identity preservation in relationships than previous generations did.
The traditional model, in which two people merge their lives almost completely, feels constraining to an increasing number of adults.
Open relationships are one response to that shift.
They are not the only response, and the gender math suggests they are not a clean one.
Who Actually Makes Open Relationships Work
It would be dishonest to suggest that open relationships fail universally.
They do not.
Some couples have sustained them for decades, raised children inside them, and reported high relationship satisfaction.
The 2025 Community Survey from OPEN, the Organization for Polyamory and Ethical Non-Monogamy, conducted in partnership with Dr. Amy Moors of Chapman University, surveyed nearly 6,000 non-monogamous respondents across 65 countries and all 50 US states.
It is the largest dataset of non monogamous experiences compiled to date.
The survey found that most respondents reported high satisfaction with their arrangements.
However, they also reported significant social stigma, with 61 percent saying they had experienced prejudice or discrimination because of their relationship structure.
So success is possible.
However, the survey, along with clinical research, points to a clear profile of who actually pulls it off.
The couples who succeed tend to be older.
Most stable, long-term, non-monogamous couples are in their forties or fifties, not their twenties or thirties.
They have spent years building trust before opening anything up.
They tend to have done significant therapy work together, often for years.
They are not opening the relationship to fix a problem or test a hypothesis.
They are opening it from a place of security.
They tend to have aligned expectations regarding external partners from the outset.
Both people want similar things.
Neither one is secretly hoping the arrangement will become a soft exit ramp.
Moreover, they communicate constantly, not occasionally.
Weekly check-ins are standard.
Some couples in long-term open arrangements describe more conversations about feelings in a single month than monogamous couples have in a year.
The Reddit boyfriend did not meet any of these conditions.
He opened the relationship to test his own market value, set a rule against communication, and assumed the math would work in his favor.
Every researcher who has studied this category could have told him on day one how the next six months would unfold.
The Numbers At A Glance
| What The Data Shows | Approximate Figure | Source |
|---|---|---|
| Americans who have tried consensual non-monogamy at some point | Around 1 in 5 adults | Journal of Sex and Marital Therapy, 2017 |
| Currently in a consensually non-monogamous relationship | Roughly 3 to 5 percent of partnered adults | BYU iFidelity Survey, 2019, and other national samples |
| American men who had zero dates in 2025 | 51 percent | Hily State of Dating Report |
| Dating app gender skew, men to women | Around 62 percent male globally; 3 to 1 on Tinder | Multiple platform reports |
| Female swipe right rate | 5 to 8 percent of profiles | Industry data analyses |
| Male swipe right rate | 40 to 46 percent of profiles | Industry data analyses |
| Singles who say the gender gap in dating is widening | 70 percent overall; 80 percent of Gen Z | Singles in America 2025 |
These numbers do not predict every individual outcome.
However, together they explain why the Reddit boyfriend’s experience was not an unlucky exception.
It was the expected result of an arrangement built on assumptions that the broader dating market does not support.
A Quick Piece Of Trivia
Here is something most people do not know.
The earliest documented open-marriage manifesto in modern Western culture is often traced to a 1972 book titled Open Marriage, written by Nena and George O’Neill. The book became a runaway bestseller and helped move non-monogamy into the cultural mainstream for the first time. However, the part nobody remembers is what came after.
The O’Neills quietly walked back the open part of their philosophy within a few years. They later argued in follow-up writing that the sexual openness chapter had taken on a life of its own, and that their original argument was really about psychological flexibility and growth inside marriage, not extramarital partners. More than half a century later, the same misunderstanding is still being relitigated in American living rooms.
The Honest Takeaway
The boyfriend in the viral Reddit post did not lose because open relationships are inherently doomed.
He lost because he opened a door he was not prepared to walk through.
He assumed the arrangement would prove his desirability.
The dating market, with its severe gender skew and its punishing reality for average men in their thirties, proved the opposite.
Moreover, he was so unprepared for that result that within weeks, he was breaking his own rules and demanding his girlfriend break hers.
This is the part of the story that has stuck with American readers across class, age, and political lines.
Not the drama itself, but the recognition.
Most Americans know a couple who tried something similar.
Most know how it ended.
The deeper point is not that monogamy is the only valid model.
Plenty of American couples make non-traditional arrangements work, and they should be free to do so.
The 2025 OPEN survey makes clear that satisfaction in non-monogamous relationships is real and often high.
The deeper point is that any relationship structure, traditional or not, requires both partners to be honest about what they actually want, what the data actually shows, and what they can actually handle.
Most people overestimate all three.
The couple in the viral story did too.
In a country where more adults are quietly questioning what a long-term partnership should look like, this small Reddit post has become a much larger mirror.
The math problem it exposes won’t go away.
If anything, as dating apps deepen the gender skew, it is getting worse.
The question for every couple curious about opening their relationship is not whether the idea is exciting in theory.
The question is whether they can survive what happens when the math arrives at their doorstep.
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