Why We Flirt: The Science of Sex

It’s so natural, we barely even notice we do it. Tilting a head to expose the neck, smiling or laughing at something that really wasn’t funny, moving closer to the person making unfunny jokes, mimicking their actions. Our body language is perhaps the most subtle expression of what we’re really thinking and feeling, and is a crucial component of the courting dance known as flirting.

Though cheesy pick-up lines abound, a lot is conveyed even before words are uttered. A prolonged gaze or arched eyebrow gives clues to the person across the bar that you’re interested without having to explicitly ask about his/her sign. Though the statistics differ, some attribute almost 80 percent of our first impressions to our stance and swagger. And because flirting helps both animals and humans find mates faster and easier, it is an evolutionary trait hard-wired in our brains. Mice twitch their noses at potential mates, colorful peacocks strut around for admiring peahens, and pigeons puff their chests to look buff. As much as we have moved on from mice and feathers, we do much of the same, for the exact same reasons.

Genetic Peacockery
Because flirting is an easy way for us to display our genes, mating potential, and interest, nature put a lot toward its success. This is one of the reasons why some males birds have exotic plumes, why elk carry hefty antlers (a sign of a healthy immune system), and why male fiddler crabs have such large claws. He waves his in the air, alerting females to his whereabouts, and signaling them to come closer for a better look at his burrow, colorful shell, and flashy claw.

Much in the same way, we’re physically programmed to indicate interest almost before we mentally have a say in it. Slight actions reveal a lot. Stance, eye movement, and gestures like leaning forward to talk to the person, or quick eyebrow raises are what scientists call contact engagement, signaling to the other mammal that you’re prepared for things to potentially get physical. Perhaps most importantly, these signals show that you’re not intending to dominate or flee. Or not just yet, anyhow.

Moves Have Messages
By studying humans in their natural courting habitat (usually bars), scientists have been able to document the movements we make when we’re interested in someone else. As it turns out, we’re all quite predictable. A woman smiles, raises her eyebrows, opens her eyes wide, holds a gaze, fidgets with her hair, lowers and tilts her head, and laughs. A man might jut out his chin, try to make his chest appear as large as possible, unconsciously flex an arm, laugh aloud, and smile. But what do all these ridiculous gestures mean?

By comparing our actions with those of animals, it becomes clear that moves have messages. A woman tilts her head and shows off her neck as a sign of vulnerability and submission. I see my friend’s dog, a female boxer named Mable Mae, do this all the time. When a male dog is approaching, she turns her head and flattens her ears as if to say, “I’m a lover, not a fighter. Don’t bite.” The male dog naturally assumes the taller, dominant stance. Mable also steals sideways glances, just as we do when flirting, to show she’s demure and hard to get, yet interested.

Read My Lips
Like a lioness presenting herself to a mate, women will arch their backs and show off their hips to indicate fertility. Though I hate the stereotype of a giggly, doe-eyed blonde, women laugh and open their eyes wide not because they’re ditzy, but because it conveys an image of surrender and youth. (No wonder Dolly Parton was so jovial and popular.) While both men and women will make prolonged eye contact with people they’re interested in, a woman might also lick her lips, helping to bring visual attention to the mouth. If someone is staring at your lips he may be thinking of how to kiss them.

15 readers liked this story.
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09.29.2010
Matt Albrecht
To be sure, my ire has more to do with the fact that no science whatsoever is found in the article, and the word is being evoked to lend credibility to a lazy article whose entire premise hinges on a few stereotypical observations and anecdotes. There are no theories being put to the test, no variables being factored, no diverse sample being considered, no process at all. This is "science" in the same way that watching a handful of Two and Half Men episodes makes me qualified to write an article on the "scientific fact" that bitches be crazy. But it's a little more offensive than that. It's, again, evoking all the credibility of "science" (in word only) to flippantly argue that these observations in a bar are evidence of innate human sexual behaviors. It all inevitably lends itself to more mindless indulgence in the standard myth, doing (I'd argue) nothing but harm in setting back human sexuality progress.
09.29.2010
Matt Albrecht
And Bonobos (as well as humans in ACTUAL natural settings) don't play coy and don't obey the rules of peacocking competition among males and Gorilla-like male-dominance roles that we take for granted in our unnatural courting game. There is no scientific reason to flirt merely for the sake of flirting. None. Nada. Zilch.
09.29.2010
Matt Albrecht
This is part of the problem, folks. There's not an ounce of "science" in this entire article: "By studying humans in their natural courting habitat (usually bars), scientists have been able to document the movements we make when we’re interested in someone else." Really? An artificial social construct heaped within countless other artificial social constructs is what counts for "natural?" And certainly, humans do a great deal of imitating when it comes to other animals, but we definitely don't share any significant genetic ancestry with peacocks or dogs that would inform our innate sexual behavior today. Natural humans in a natural setting are most like Bonobos, who we have the most genetic and scientifically quantifiable similarities to. Enough misinformation, goddammit!
09.22.2010
Dackl Minga
After analysis, there should be through practical and vigourous investigation. Or so most scientists hope.
06.20.2010
Liam Randall
You've gotta love how science always manages to ruin things that are a mystery by reducing them to their plain, gray, and boring details. None the less, this is a very insiteful article.
It feels good to write.

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