The surprising science of romantic attraction
Picture this: you’re sitting in your favourite Đà Lạt café (mine is Les Sapins), scrolling through yet another dating app, wondering why that perfectly polished profile left you feeling absolutely nothing, while the barista with the crooked smile and milk-stained apron has you completely distracted.
If this scenario feels familiar, you’re not alone—and you’re certainly not going mad.
The modern dating landscape has left many of us feeling like we’re playing a game where nobody bothered to explain the rules. We’re told to be rational, to look for ‘green flags’ and compatibility markers, yet our hearts seem to have their own mysterious agenda. One moment we’re convinced we’ve found ‘the one’ based on a brilliant conversation, the next we’re questioning why someone who ticks every box on our mental checklist leaves us feeling like we’re having dinner with our accountant.
This confusion isn’t a character flaw—it’s actually evidence of one of the most sophisticated systems nature has ever devised. Recent psychological research has begun unravelling the complex dance between our unconscious drives and conscious choices that determines romantic attraction, and the findings are both fascinating and surprisingly practical.
The invisible orchestra of attraction
What if I told you that right now, as you read this, your body is constantly engaged in an intricate biological conversation with everyone around you? Long before your conscious mind registers someone as attractive, your nervous system is already deep in negotiation, conducting what researchers call ‘physiological and behavioural synchrony’.
Dr Shir Atzil’s groundbreaking research at the Hebrew University of Jerusalem revealed something remarkable: when two people are genuinely attracted to each other, their bodies begin to synchronise in ways they’re completely unaware of. Heart rates align, breathing patterns match, and even subtle movements begin to mirror each other. It’s as if our biology recognises a potential partner through a secret handshake our conscious minds never see.
Think about those conversations where time seems to disappear, where you find yourself naturally leaning in, where the rhythm of dialogue feels effortless. That’s not just good conversation—that’s your autonomic nervous system recognising compatibility at the deepest level. Zeevi and colleagues discovered in their 2022 study that this bio-behavioural synchrony significantly predicts mutual attraction, operating as a kind of biological compatibility test that happens entirely below the threshold of awareness.
This explains why that charming person from the networking event might have seemed perfect on paper but left you feeling oddly disconnected. Your biology was sending a different message than your rational mind, and as it turns out, your body might have been onto something.
But synchrony is just one instrument in attraction’s invisible orchestra. Our sensory systems are simultaneously processing hundreds of subtle cues—the way someone moves, their natural scent, the cadence of their voice, the micro-expressions that flicker across their face. This sensory information creates what researchers call ‘automatic attraction responses’ that occur within milliseconds of meeting someone.
Fascinatingly, what we find attractive in these physical characteristics isn’t fixed. Cross-cultural research by Viktor Karandashev and his international team found that in traditional societies, stable physical traits like facial symmetry carry more weight in attraction. But in modern, urbanised cultures—like our own cosmopolitan Australian cities—changeable characteristics such as personal style, grooming choices, and expressive behaviour become increasingly important.
This cultural shift reflects something profound about contemporary romance: we’re no longer just selecting mates based on genetic fitness markers. We’re also drawn to signs of creativity, self-awareness, and the ability to consciously craft one’s identity. That barista’s paint-stained apron isn’t just attractive because it’s unconventional—it signals someone who prioritises creative expression over conformity, and your unconscious mind is registering that as valuable information about their character.
When emotions hijack attraction
Perhaps most surprisingly, researchers have discovered that our emotional state in any given moment can dramatically influence who we find attractive. Laura Sels and her Belgian research team found that feeling positive or negative after one interaction can influence how attracted we feel to the next person we encounter—what they call ’emotional spillover effects’.
This means that brilliant first date might have been influenced not just by your companion’s wit and charm, but by the fact that you’d just received good news about a promotion or even that you’d enjoyed an unexpectedly pleasant conversation with your Grab driver. Conversely, that underwhelming coffee date might have been sabotaged by the parking fine you discovered on your windscreen beforehand.
Understanding this emotional context doesn’t diminish the validity of attraction—it simply reveals how nuanced and contextual the whole process really is. Your emotional state acts like a filter, subtly adjusting your receptivity to connection and colouring your perception of potential partners.
The conscious mind enters the conversation
While unconscious forces lay the groundwork for attraction, our conscious minds play an increasingly crucial role as relationships progress beyond initial chemistry. This is where personality traits and attachment styles begin to shape our romantic decision-making in profound ways.
Research by Turkish psychologists Ceylan Tosun and her colleagues revealed that people with secure attachment styles—those comfortable with both intimacy and independence—tend to make more deliberate, thoughtful relationship choices. They’re better at evaluating long-term compatibility beyond initial sparks, like seasoned wine enthusiasts who can distinguish between a pleasant drop and something with real aging potential.
In contrast, those with anxious or avoidant attachment patterns often find their relationship decisions more heavily influenced by unconscious emotional patterns developed in childhood. It’s not that one approach is right and the other wrong—it’s about understanding your own patterns so you can make more conscious choices about potential partners.
Humans also exhibit what researchers delightfully term ‘progression bias’—a tendency to favour starting and maintaining relationships even when they might not be optimal matches. Samantha Joel’s research at Western University suggests we’re evolutionarily wired to prioritise connection over perfection, sometimes leading us to continue relationships with less suitable partners rather than face the loneliness of singlehood.
This bias isn’t necessarily problematic—it reflects the fundamental human need for companionship and the inherent value we place on relationships themselves. But understanding it can help us distinguish between healthy relationship optimism and settling for relationships that don’t truly serve us.
The compatibility paradox
Here’s where the research becomes both humbling and liberating: despite our sophisticated understanding of attraction patterns, scientists cannot reliably predict whether two specific individuals will feel mutual attraction before they meet. Eli Finkel’s extensive research at Northwestern University found that while dating algorithms can identify general compatibility markers, they consistently fail to predict that ineffable spark between two unique people.
This isn’t a limitation of science—it’s a feature of human complexity. The same qualities that attract you to one person might leave you completely indifferent in another. Context, timing, life circumstances, and countless other variables create a unique situation every time two people encounter each other. As one researcher wryly noted, if attraction were predictable, we’d have solved the dating crisis years ago—and relationship counsellors would be looking for new careers.
Navigating modern romance with ancient wisdom
So where does this leave us in our quest for meaningful connection? The research suggests that both unconscious attraction and conscious choice serve important functions in successful relationships. The biological synchrony and sensory attraction that create initial chemistry provide the foundation—they’re evolution’s way of rapidly assessing basic compatibility. But conscious evaluation of shared values, life goals, and communication styles builds the framework for long-term satisfaction.
Rather than dismissing attraction as purely irrational chemistry or believing we can think our way to love, we can appreciate the sophisticated system evolution has provided. Our unconscious minds excel at rapid compatibility assessment, while our conscious minds help us evaluate long-term potential and make thoughtful relationship decisions.
The next time you feel that mysterious pull toward someone—whether it’s the barista with the crooked smile or the intriguing stranger at a dinner party—remember that you’re experiencing millions of years of evolutionary fine-tuning working alongside your unique personal history and conscious values. Romantic attraction remains beautifully complex, a testament to the intricate creatures we are and the profound connections we’re capable of forming.
Understanding the science doesn’t diminish the magic—it simply helps us navigate the journey with greater wisdom and self-compassion. And in a world where dating apps promise algorithmic solutions to matters of the heart, perhaps that’s exactly the kind of insight we need.
References
Baxter, A., Maxwell, J., Bales, K., Finkel, E., Impett, E., & Eastwick, P. (2022). Initial impressions of compatibility and mate value predict later dating and romantic interest. Proceedings of the National Academy of Sciences of the United States of America, 119. https://doi.org/10.1073/pnas.2206925119
Joel, S., Eastwick, P., & Finkel, E. (2017). Is romantic desire predictable? Machine learning applied to initial romantic attraction. Psychological Science, 28(10), 1478-1489. https://doi.org/10.1177/0956797617714580
Joel, S., & Macdonald, G. (2021). We’re not that choosy: Emerging evidence of a progression bias in romantic relationships. Personality and Social Psychology Review, 25(4), 317-343. https://doi.org/10.1177/10888683211025860
Karandashev, V., Zarubko, E., Artemeva, V., Evans, M., Morgan, K., Neto, F., Feybesse, C., Surmanidze, L., & Purvis, J. (2020). Cross-cultural comparison of sensory preferences in romantic attraction. Sexuality & Culture, 24(1), 23-53. https://doi.org/10.1007/S12119-019-09628-0
Scheller, M., De Sousa, A., Brotto, L., & Little, A. (2023). The role of sexual and romantic attraction in human mate preferences. The Journal of Sex Research, 61(3), 299-312. https://doi.org/10.1080/00224499.2023.2176811
Sels, L., Ceulemans, E., Bulteel, K., & Kuppens, P. (2018). The impact of emotions on romantic judgments: Sequential effects in a speed-dating study. Journal of Social and Personal Relationships, 36(8), 2437-2454. https://doi.org/10.1177/0265407518789288
Tosun, C., Yıldırım, M., Altun, F., & Yazıcı, H. (2021). Personality traits and attachments styles in romantic relationships deciding. Journal of Family Issues, 43(5), 1219-1234. https://doi.org/10.1177/0192513X211022383
Zeevi, L., Selle, N., Kellmann, E., Boiman, G., Hart, Y., & Atzil, S. (2022). Bio-behavioral synchrony is a potential mechanism for mate selection in humans. Scientific Reports, 12, Article 4269. https://doi.org/10.1038/s41598-022-08582-6
