Daily Dosage: Psst. Your lesbianism is showing.

Do you know a lesbian when you see one?

An extremely unusual study to kick off your week – and maybe make you rethink that one-night stand. Didn’t her eyes look a little bit…lesbian…or something?

Your finely tuned gaydar might actually have merit, according to a new study in the Journal of Experimental Social Psychology. Researchers based their project on a previous investigation, which found that a man’s sexual orientation could be accurately determined from a 40 millisecond glimpse of his face.

But could the same be true for the lesbians lurking among us?

Yup. One hundred “self identified” lesbians and another hundred “self identified” straight women were plucked from online dating websites. Each provided a photo with the absence of makeup, accessories or expression. Then, study participants were given 40 millisecond glimpses of each woman’s face. Quick-view accuracy was “significantly better” than that of random guessing. And, surprisingly, it was also better than longer deliberation on each woman’s photo.

Researchers cut out other visual variables, because they wanted to eliminate preconceived notions about lesbian and straight appearance (shaved heads vs. blond perms, lip chap and bushy eyebrows vs. ruby red lipstick). So if it’s not the giant “Lesbian” tattooed to a woman’s forehead, then what is it? Apparently, the eyes tell the story: when faces were later cropped to solely the peepers, lesbianism was even more easily detected with mere seconds of viewing.

So what does the study mean for a straight man on the prowl? When hitting the singles bar, you should probably trust your instinctual gaydar. If her eyes say “come hither,” look more closely. She may be pining for the woman behind you.