Flirting is a form of covert courtship signaling, a way of communicating romantic or sexual interest to someone while keeping the stakes low enough that both people can save face if the interest isn’t mutual.1PubMed Central. Covert sexual signaling: human flirtation and implications for other social species That deniability is what separates flirting from a direct confession, and it’s also what makes flirting so easy to misread. Research on the topic spans evolutionary biology, communication studies, neuroscience, and digital behavior, and the picture that emerges is more interesting than most people expect.
Why Flirting Exists at All
From an evolutionary standpoint, flirting solves a problem that blunt honesty creates. Announcing your attraction outright carries real social risk: rejection in front of others, damage to a friendship, awkwardness in a shared social circle. Flirting lets you test the waters without fully committing to the attempt. Researchers describe it as a signal that conveys both your intentions and your desirability to the person you’re interested in, while minimizing the cost of getting it wrong.2PubMed Central. Covert sexual signaling: human flirtation and implications for other social species If the other person responds warmly, you escalate. If they don’t, you both pretend nothing happened.
This is unusual in the animal kingdom. Most species rely on fixed, unambiguous courtship displays, think of a peacock fanning its tail feathers or a frog calling from a pond. Human flirting is flexible and context-sensitive. The same research proposes that people who are courting adjust the intensity of their signals depending on how risky the social situation is, and that receivers may actually use this flexibility as a gauge of the flirter’s social intelligence.3PubMed Central. Covert sexual signaling: human flirtation and implications for other social species In other words, being a skilled flirter doesn’t just show that you’re interested. It shows that you understand when and how to show interest, which is itself attractive.
What Flirting Actually Looks Like
If you’ve ever tried to write down what counts as flirting, you know it’s slippery. One of the earliest systematic attempts to catalog flirtatious behavior involved observing over 200 women in natural social settings and documenting 52 distinct nonverbal behaviors that reliably attracted male attention.4Ethology and Sociobiology. Nonverbal courtship patterns in women: Context and consequences The behaviors ranged from the obvious, like sustained eye contact and hair-flipping, to subtler signals like leaning in, tilting the head, or briefly touching the other person’s arm. The key insight was that these behaviors were defined not by what the women intended, but by what actually worked: if a gesture consistently drew a man’s attention, it made the list.
Verbal flirting has its own patterns, and they don’t split evenly between the sexes. In studies comparing flirting tactics across American and Norwegian samples, humor stood out as a particularly gendered tool. Being funny was rated as more effective when men did it, especially in contexts where people were looking for something longer-term. When women used humor to flirt in short-term contexts, it was rated as the least effective approach. But laughing or giggling at someone else’s jokes worked well regardless of who was doing it.5PubMed Central. Perceived Effectiveness of Flirtation Tactics: The Effects of sex, Mating Context and Individual Differences in US and Norwegian Samples The implication is a little uncomfortable in its asymmetry: for men, making someone laugh is a strong play; for women, appreciating someone’s humor sends an equally clear signal.
Why You’re Probably Bad at Spotting It
Here’s where flirting gets genuinely humbling. Most people think they can tell when someone is flirting with them or with someone else. The research says otherwise, and the pattern of errors is lopsided in a specific way.
In one study, pairs of strangers talked for about ten minutes and then reported whether they had been flirting and whether they thought their partner had been flirting. People were better at identifying when flirting had not occurred than when it had. That is, if neither person was flirting, both tended to get that right. But when one person was flirting, the other often missed it entirely.6Communication Research. Accurately Detecting Flirting A follow-up using video clips showed the same pattern from the outside: observers watching short clips of these conversations were more accurate at spotting the absence of flirting than its presence. Female flirters were somewhat easier for observers to read than male flirters.7Communication Research. Accurately Detecting Flirting
Separate research tested whether third-party observers could detect genuine attraction (as opposed to just friendliness) by watching people on actual dates. They couldn’t, at least not consistently. The ability to spot attraction wasn’t improved by the observer’s age, the length of the clip they watched, or even their general ability to read emotions. The one exception was when both people on the date were mutually interested in each other. In that case, observers could detect it above chance.8PubMed Central. Can third-party observers detect attraction in others based on subtle nonverbal cues? Mutual attraction, it seems, produces a different quality of interaction that’s visible from the outside. One-sided interest is much harder to pick up on.
The practical takeaway is that you should be skeptical of your own radar. The most common error isn’t imagining interest where none exists. It’s failing to notice it when it’s there. The covert nature of flirting, the very thing that makes it socially useful, is also what makes it easy to miss.
What Happens in Your Brain
Flirting doesn’t just feel like something is happening in your body. Something genuinely is. The neural systems involved in courtship are ancient and shared across vertebrates. When you lock eyes with someone you find attractive, your brain activates motivational and attentional circuits driven by dopamine, arousal systems linked to noradrenaline, bonding pathways involving oxytocin and vasopressin, and reward circuits tied to endorphins.9Sexual Medicine Reviews. From distal to proximal to interactive: behavioral and brain synchrony during attraction, courtship, and sexual interaction These systems work together to create the experience of heightened attention, nervous energy, and pleasure that accompanies a good flirtatious exchange.
These same circuits also drive behavioral synchrony, the tendency for two people in a positive interaction to unconsciously mirror each other’s movements, posture, and expressions. A smile prompts a smile. A lean forward is matched by a lean forward. This mirroring isn’t just a byproduct of attraction; it’s part of the mechanism by which connection is built. When it’s working well, both people feel understood and attuned to each other, even if neither could explain exactly why.
Flirting Through a Screen
Digital communication strips away most of the nonverbal channels that flirting relies on. There’s no tone of voice, no eye contact, no lingering touch. Modern daters who connect through apps and text messages face a genuine communication problem: how do you signal interest in a medium designed for exchanging information, not building chemistry?10PubMed Central. Worth a thousand interpersonal words: Emoji as affective signals for relationship-oriented digital communication
Emojis have stepped in to fill some of that gap, and their role goes beyond simple decoration. Research on emoji use in online dating found that matching emoji patterns functions as a kind of digital compatibility test. People pay attention to whether a potential match uses emojis with similar frequency, chooses similar types, and deploys them in similar ways. Aligned emoji habits are read as signals of compatible personality traits like humor and emotional maturity, while mismatches can quietly disqualify someone.11Poetics. Testing, filtering, and insinuating: Matching and attunement of emoji use patterns as non-verbal flirting in online dating
Emojis also reduce ambiguity in a medium that desperately needs it. A study on how emojis shape the interpretation of flirtatious text conversations found that including emojis made the sender’s romantic intentions clearer to the reader.12Symbolic Interaction. The Power of a 😉: Emojis Reducing Ambiguity in Digitally Mediated Romantic Encounters That clarity cuts both ways, though. When the sender’s intentions were sexual rather than playful, the added clarity amplified the discomfort that recipients felt. A winking face after a suggestive message doesn’t soften it. It confirms it.
Flirting Skills and Relationship Success
Flirting isn’t just a frivolous social game. It has measurable consequences for people’s romantic lives. A study of nearly 600 adults found that more than 40% reported difficulty starting or maintaining an intimate relationship. When the researchers looked at what predicted these difficulties, flirting skills had the largest effect, outweighing both the ability to detect when someone else was interested and shyness.13PubMed Central. Mating Performance: Assessing Flirting Skills, Mate Signal-Detection Ability, and Shyness Effects People who struggled to flirt effectively were more likely to struggle in love, and the link was strongest for the initial phase of getting a relationship off the ground.
This finding is worth sitting with for a moment, because it runs counter to the popular idea that “being yourself” is the main thing that matters. Being yourself is fine advice as far as it goes, but the data suggest that how you communicate interest is a distinct skill that meaningfully affects outcomes. Someone can be attractive, kind, and genuinely interested in another person and still fail to get that across if their flirting skills are weak.
What Motivates Different Flirters
Not everyone who flirts is trying to start a relationship. People flirt to boost their self-esteem, to get something they want, for entertainment, or simply because they enjoy the social exchange itself. The motives behind flirting are where personality gets interesting.
A large study of over 900 participants (plus two informants per person, to get an outside perspective) found that people with higher levels of manipulative, narcissistic, or psychopathic personality traits, collectively known as the Dark Triad, were more likely to flirt for instrumental reasons, meaning they used flirting as a tool to extract favors, attention, or advantages, rather than as a genuine expression of romantic interest.14Personality and Individual Differences. Flirting for me or flirting for we? The Dark and Light Triads as predictors of flirting motive People with the opposite personality profile, high in traits like empathy and honesty, didn’t show a strong link to any particular flirting motive. In other words, being a decent person doesn’t predict how or why you flirt, but being manipulative does.
Age also shifts preferences. Older adults rated gentler, less aggressive flirting approaches as more effective, a pattern that likely reflects both changes in what people find attractive and the accumulated social wisdom that comes with experience.15Personality and Individual Differences. The art of flirting: What are the traits that make it effective?
Flirting at Work
The workplace is where the covert nature of flirting runs into formal rules and genuine power dynamics. Expressing romantic interest in a coworker creates a tension between two legitimate concerns: the desire to pursue a connection and the risk of causing harm or discomfort. Research on how people navigate this tension reveals a fragmented landscape with no shared playbook.
In interviews with 87 tech workers, only about a quarter expressed concern that making a romantic advance could be harmful to the other person. Among those who did recognize the tension, three distinct strategies emerged. Some practiced complete self-restraint, never expressing interest at all. Others took a “soft pursuit” approach, flirting indirectly and looking for reciprocal signals before going further. A third group preferred direct declarations of interest, viewing clarity as the most respectful option.16Sex & Sexualities. Negotiating Competing Sexual Rights: The Unwritten, Fragmented Norms for Making Romantic Advances in the Workplace These approaches directly contradict each other, and the people using them were all convinced their way was the ethical one. The absence of shared norms means that two well-intentioned people can easily find themselves operating on completely different assumptions.
When the Usual Scripts Don’t Apply
Most research on flirting has been conducted with heterosexual populations, which means it reflects a courtship culture built on fairly predictable gender roles: men initiate, women respond, and both sides draw on a shared (if imperfect) cultural script. For queer individuals, that script is often absent or unreliable.
Research exploring how women of queer sexualities navigate flirting found recurring challenges around signaling. Without the assumption that a woman is interested in other women, every flirtatious gesture carries an extra layer of ambiguity. Participants described relying on non-verbal queer signaling, things like clothing, accessories, and hairstyle choices that communicate identity within the community, alongside queer-coded verbal cues that would read as ordinary conversation to someone outside it.17Deep Blue. Is She Being Friendly or Flirty? Exploring Attitudes Towards Female Genitalia, Vabbing, and Attraction Tactics Amongst Women of Queer Sexualities in Queer Courting Gender expression added another variable: more feminine-presenting women reported particular difficulty being recognized as queer in the first place, making the initial flirting problem not “will they like me back” but “will they even know I’m an option.”
This highlights something that heterosexual flirting research often takes for granted: before you can flirt effectively, both people need to be on the same page about what kind of interaction is even possible. In contexts where that can’t be assumed, the entire dynamic shifts, and flirting requires solving a different problem first.
Mutual Interest Changes Everything
One thread runs through nearly all of this research: the difference between one-sided and mutual interest. As the detection studies showed, outside observers can only spot attraction reliably when both people are into each other.18PubMed Central. Can third-party observers detect attraction in others based on subtle nonverbal cues? The neuroscience literature on behavioral synchrony points in the same direction: the mirroring of expressions and movements that makes a connection feel electric depends on both parties being engaged.19Sexual Medicine Reviews. From distal to proximal to interactive: behavioral and brain synchrony during attraction, courtship, and sexual interaction
This has a practical implication that’s easy to overlook. The question most people ask about flirting is “how do I get better at it,” which frames it as a performance, something you do to someone else. But the evidence suggests that the most recognizable and rewarding flirtatious interactions aren’t performances at all. They’re collaborations. Two people adjusting to each other, escalating together, mirroring each other’s energy. When that’s happening, the signals become clear to both participants and even to bystanders. When it’s not happening, no amount of technique will make it visible from the outside, because the chemistry that makes flirting readable is generated between two people, not projected by one.