Dr. Paul Eastwick on the Real Science of Attraction, Compatibility and Romance

High-Level Overview

Andrew Huberman talks with Dr. Paul Eastwick, a psychology professor at UC Davis who studies how people choose partners, about what the data actually show on attraction, dating and lasting relationships. Eastwick challenges the popular "mate value" story, in which everyone is a six or a nine and competes for the same few people. That story describes first impressions among strangers reasonably well, he says, but once people get to know each other, their opinions diverge, compatibility emerges, and many of the gender differences people argue about online shrink or vanish.

The tone is curious, friendly and optimistic, with plenty of personal stories: Huberman's mortifying Sadie Hawkins dance, a romance in a neighboring lab sparked by skill at aliquotting, and Eastwick's own high school girlfriend leaving him for his best friend. The conversation moves from evolutionary theory and dating apps through gender differences, age and money, to what keeps long-term relationships healthy, and keeps returning to one practical theme: spend repeated time with people in small groups and shared activities.

The Discussion Explores:

• Why the marketplace model of mate value fits first impressions but breaks down as people get to know each other
• How attraction forms slowly through shared moments, stories and reciprocity, rather than instant sparks
• Dating apps and their "unequal market", plus the advantage texting gives witty, hyperverbal people
• Social support and gender: why men lean more on their partners and are more eager at every stage
• What men and women actually want: similar responses to ambition and to younger partners in face-to-face data
• Perceived versus actual similarity, and why matching people on paper is close to a coin flip
• Alternative partners, social media and infidelity, including the "derogation of alternatives"
• Breakups, sexual satisfaction and the value of group activities for both singles and couples

Deep Dive into Main Ideas

Mate Value Works for Strangers, Not for Acquaintances

Eastwick describes a classroom demo in which students wear random numbers on their foreheads that others can see but they can't, and are told to pair up with the highest number they can. Students with low numbers quickly panic because nobody will talk to them. This, he says, is a fair picture of initial attraction among strangers, where people roughly agree on who is most desirable based on traits like attractiveness, status or money.

But the demo only works because everyone can read the numbers. In real life, as people spend time together, "we stop agreeing about who the eights are and who the fives are." Someone the crowd rates a six might strike you as a nine, or a three. Even for snap "hot or not judgments after brief interactions, two people agree only about two-thirds of the time. This growing idiosyncrasy is what lets people who aren't consensually the most desirable find each other, and Eastwick calls this emerging compatibility the piece missing from evolutionary narratives. Huberman connects the crowd-following alternative, which researchers call mate choice copying, to junior high" thinking.

Attraction Builds Slowly Through Shared Moments

Asked what really drives attraction, Eastwick says it often comes from unique, reciprocal experiences: two people in a mixed group end up talking about family problems, each listens and supports the other, and the time spent together becomes the material that makes one person's opinion diverge from everyone else's. Huberman's example is a lab colleague who fell for a woman after watching her aliquot antibodies at speed while chatting; they're now married with children. The point isn't to learn to aliquot, Eastwick jokes, but that couples' stories and in-jokes start earlier than we think.

Contrary to the idea that you need an instant spark, "the typical first impression is middling." Over further meetings people gather moments across different trait categories: he's funny, he's a good listener, he's attractive when he does a particular thing. A window of uncertainty slowly collapses into a stable impression, usually over roughly the first month. This middle phase is Eastwick's favorite subject and also the hardest to study. Researchers can easily study four-minute impressions or established couples, but not what happens between minute 10 and day 30. He also notes that people are strongly biased in favor of their partners, and he doubts the crowd's view is usually more accurate than your own.

Why Dating Apps Feel So Hard

On apps, the most popular people get most of the right swipes and messages, which is why some call app dating one of the most unequal markets in the world. Ordinary acquaintanceship isn't nearly so skewed. Apps also turn dating into an interview about traits, whereas "The life of the thing is the little stories and moments that two people are sharing." Eastwick notes a large gender difference in swiping: women swipe yes on about 5 percent of profiles, men on about half. He suspects apps chase engagement and need to attract more women because men outnumber them; matchmaking companies, which need happy dates, are more willing to share data with researchers.

Huberman raises texting, which he thinks rewards hyperverbal, witty people over good in-person listeners, a skill with a known sex difference. Eastwick agrees it may skew things, while noting early research showing anxious people benefit from the time to compose their words. He cites Mimi Brinberg at Ohio State, who analyzes couples' complete text histories and finds that their styles converge over time. Both men prefer dates built around doing something together, such as hikes, shows or even an escape room by the third date, and Eastwick points to the film Say Anything, where the first date is a party and she starts to fall for him while watching him take a friend's keys so they won't drive.

Social Support: Why Men Are More Eager

Eastwick calls this the big gender difference: women generally cultivate social support from many parts of their lives, while men get most of theirs from their romantic partner. As a result, across every stage of a relationship, men are a little more eager. They're more likely to say "I love you" first, want exclusivity and move things forward, while women are more likely to want to break up and men more likely to think about exes afterward. New review papers show a consistent, medium-sized effect, which runs against the stereotype of the noncommittal man.

What matters most, Eastwick explains, isn't actually calling on friends but the sense that people are there if you need them, which the two compare to a bank account you never have to dip into. He worries about men, especially lower-income men, who feel their social networks have disappeared and may drift toward nastier corners of the internet. His own remedy in his 20s and 30s was countless kickball and softball teams. For couples, he recommends couple friends and double dates, which offer validation without asking outsiders to judge your relationship, since outsiders rarely know what's really going on.

What Men and Women Actually Want

For decades, surveys have shown men say they value attractiveness more and women say they value earning potential more. Eastwick's speed-dating studies measured what people actually responded to face to face. Men liked ambitious women a little more, and women liked ambitious men a little more, and "the magnitude of that preference was identical." Across 20 years of studies, ongoing relationships and more than 40 countries, he says the pattern holds: gender differences in stated preferences largely disappear when people evaluate real people they've met. His advice is to trust your subjective experience with a person rather than your checklist.

The same surprise shows up with age. In matchmaking data where men averaged about four years older than women, men were slightly more interested in younger dates, but women were too, even when they'd asked not to be set up with younger men. Eastwick calls this finding more tentative. The real-world age gap is real, he says, but it doesn't arise on the first date. On money, a partner's objective income has very small effects on how they're seen, though a couple's shared resources matter. Marriages used to be more fragile when the wife earned more, but that stopped being true in the 1990s, and women out-educating their partners isn't a risk factor. What worries him is men losing their sense of purpose. He also addresses the famous study in which strangers asked people to bed: men were about 20 times more likely than women to say yes, but when people recall offers from someone they knew, the gap shrinks to about two times, which he takes as a lesson that meeting through friends works better than approaching strangers. He calls the online framing of men versus women "heteropessimism, and Huberman recalls a post saying the way you destroy a society is to get the men and the women to hate each other."

He notes that same-sex couples have historically taken longer to form relationships, partly because of what he calls a "bigotry tax" on disclosing feelings, and credits apps with helping people in unsafe places find partners.

Perceived Similarity Beats Actual Similarity

Feeling that "we have a lot in common" predicts attraction, but objectively measured similarity barely does. Because perceived similarity is free-floating, people who like each other find their similarities and decide those are the ones that matter, while dismissing differences, such as mismatched politics. When researchers try to predict matches from actual similarity, it's close to a coin flip, perhaps moving from 50-50 to 53-47 at best. Eastwick calls this motivated reasoning "stupid human tricks," but notes the happiest couples do exactly this.

As for where to meet people, Eastwick says his field can't tell you which app or club gives the best odds in 90 days. Church groups, running clubs, improv classes and intramural sports all work, and he suspects the specific activity matters less than getting into a small group. His advice: "be around people on repeated occasions." Huberman adds that communities like churches can support a relationship as it grows, and cautions about workplace romances.

Alternative Partners, Social Media and Infidelity

Happy partners tend to rate attractive alternatives as less desirable than they really are, which researchers call the "derogation of alternatives," a protective mechanism for the relationship. Huberman worries that social media, which he's heard described as the world's biggest dating app through direct messages, undermines this, citing divorce lawyer James Sexton's observation that many divorces start with an innocuous like or message.

Eastwick adds nuance that echoes Esther Perel. In recent studies, fantasizing about someone other than your partner raised sexual desire for the partner too, while the reverse didn't happen. "The simple fact that we can be attracted to other people, that is not a problem for the average relationship." The danger lies in escalation: repeatedly spending time with someone and keeping conversations secret, which erodes the protective layer. Harmless outlets, like a spouse's crush on a famous actor, feel safe precisely because they're distant. On why people seek attention from strangers even in happy relationships, Eastwick suggests that strangers are the one place where we feel our consensual "mate value," which shifts as we age.

Breakups, Shared Stories and Physical Intimacy

Eastwick encourages people to stop seeing ended relationships, including divorces, as failures, and to see them as real and valuable chapters. Relationship length alone is actually a bad sign on average, since people are usually happiest early on, but a shared story of growing through challenges together matters a great deal, which is also why breakups hurt: you lose continuity with your own narrative. Huberman shares that he and his girlfriend don't speak negatively about their past partners and feel grateful for what those experiences taught them.

On physical intimacy, Eastwick confirms that feeling your partner is a good lover is one of the strongest predictors of how positively you feel about the relationship, both in established couples and in early attraction. Desire waxes and wanes, and he warns against fatalism: passion can be rekindled, and relationships can thrive when it isn't there every evening. Long stretches without attraction, though, can spiral, because they also make the other partner feel undesirable.

Conclusion

Eastwick's research gives a more hopeful picture than the online narratives about dating. Mate value matters most among strangers; with time, people's impressions diverge, compatibility grows from shared moments and stories, and men and women turn out to want largely the same things. The practical takeaways are simple: trust your own experience of a person, lean toward deeper conversation (he recommends the 36 questions after an hour or so together), keep a network of friends, protect your relationship from escalating side connections, and above all spend repeated time with people in groups. Both men urge young people to go out, organize casual gatherings like the weekly volleyball games Huberman remembers from graduate school, and push back against technology that keeps them home. As Eastwick puts it, "We're still social creatures." His book Bonded by Evolution goes deeper on these ideas.

This is a summary of "Science of Attraction, Compatibility & Romance | Dr. Paul Eastwick" from Huberman Lab, giving you the GIST so you can decide if you want the REST. Listen to the full episode.