“How to Tell If a Man is Gay” — 5 Ways (Backed By Science)

Gay Dating

“How to Tell If a Man is Gay” — 5 Ways (Backed By Science)

Brian Rzepczynski Brian Rzepczynski • 10/28/15

One of the top questions I get from gay men who’ve developed a crush on someone is how to tell if he’s gay before investing all of their time and energy.

If you want a surefire way to meet men who you know are gay, check out our expert picks for the 4 best gay dating sites.

Turns out science actually has some answers for us.

5 Ways to Tell If a Man is Gay (Based On Science)

There have been a number of scientific research studies conducted that have investigated this very hot topic. Here are some of the findings that speak to how we can decipher an individual’s sexual orientation:

1. Do His Pupils Dilate When He Looks at You?

A Cornell University study reports that the pupils of our eyes dilate when viewing sexual imagery that we find exciting. This possibly suggests that when attracted or feeling erotic toward someone, our pupils will dilate and this might be one indicator of his sexual preference.

Photo of dilated pupils

Scientists say a person’s pupils will dilate when they look at someone who arouses them.

2. Does He Have a Wide and Short Face?

Researchers from the Center for Theoretical Study at Charles University in Prague and The Academy of Sciences of the Czech Republic indicate that there are some unique differences in the shape of gay versus straight men’s faces.

They purport that gay men in their study showed wider and shorter faces, smaller and shorter noses, and larger, more rounded jaws of a masculine appearance.

3. What Do His Individual Facial Features Tell You?

Similarly, a University of Washington Study also highlights how sexual orientation can be judged with fair accuracy by particular facial features and configurations.

Rather than merely adoring how cute Mr. Studman is, perhaps really inquisitively studying his facial structure and composition could reveal his true nature.

Photo of Chris Colfer

According to one study, people make snap judgments about someone’s sexual orientation based on the way their facial features fit together.

4. Does He Walk With a “Sway”?

A study published in the September 2013 Journal of Personality and Social Psychology alleges that gay men tend to walk with a slight “sway” of the hips, while lesbians walk with a back-and-forth motion of their shoulders.

Fact or reinforcement of a stereotype?

5. Is He Left-Handed, or Does His Voice Signal Anything to You?

A variety of researchers named in this article report the following findings about a confirmation of a gay sexual orientation:

  • Gay men reportedly have a 50% chance of being left-handed or ambidextrous than heterosexuals.
  • Gay men have been shown to mirror women’s tendency to have close index and ring finger lengths.
  • There is reportedly a particular quality and tone in voice pitch for gay men that makes detection of sexual orientation possible. However, these specifics were not noted in the article to substantiate the claims.
  • The hair whorl patterns on gay men’s scalps tend to be more predominantly counter-clockwise patterned and may speak to something genetic.
  • Gay men apparently have an increased density of fingerprint ridges on the thumb and pinkie of the left hand, and their arms, legs, and hands are smaller compared to their overall stature.
  • Gay men’s penises are reportedly longer and thicker than their heterosexual counterparts’ members.
Photo of man's hands

Gay men have been shown to have similar index and ring finger lengths.

If you’re going to get your answer about your office mate’s sexual orientation, you’re going to have to get creative about scanning his hairline, intimately studying his hands, and finding a way to reach into his pants to support your assumptions about where he potentially lies on the Kinsey Scale.

What Are Your Thoughts?

Can we argue with science? Are they truly substantiated, or are they biased? Do they feed into stereotypes or provide some additional clues into helping to clarify this perplexity? How is your “gaydar” wired in being able to identify whether someone is gay and a possible dating prospect?

Please share your opinions so we can generate some helpful dialogue about this important issue!


  • Dahl, Melissa. Gay or Straight? Watch His Walk! NBC News.com, September 13, 2007. Retrieved from: www.nbcnews.com/id/20762841/ns/health-mental_health/t/gay-or-straight-watch-his-walk/
  • Daily Mail Reporter. It’s All in the Eyes! Scientists Can Tell Whether Someone is Straight or Gay by Studying Optical Reflexes. Daily Mail.com, August 2012. Retrieved from: dailymail.co.uk/news/article-2184240/Scientists-tell-straight-gay-studying-optical-reflexes.html
  • France, David. The Science of Gaydar. NYMag.com, February 21, 2008. Retrieved from: handresearch.com/news/the-science-of-gaydar.htm
  • Pappas, Stephanie. Facial Hints Sharpen People’s ‘Gaydar’. LiveScience.com, May 16, 2012. Retrieved from: www.livescience.com/20360-sexual-orientation-visible-face.html
  • Sieczkowski, Cavin. Could Face Shape Reveal Whether Someone is Gay or Straight? The Huffington Post, November 7, 2013. Retrieved from: www.huffingtonpost.com/2013/11/07/gay-straight-face-shape_n_4232987.html

Photo sources: imgur.com, muscledudelife.com, ew.com, wikimedia.org