A study by Albright College evolutionary biologist Susan Hughes found that people with more symmetrical facial features are more likely to be correctly identified as heterosexual, ScienceDaily reports.
"We found differences in measures of facial symmetry between self-identified heterosexual and homosexual individuals," says Hughes. "We also found that the more likely raters perceived males as being attracted to women (i.e. holding more of a heterosexual orientation), the more symmetrical the males' facial features were." Likewise, there was a tendency for straight women to be more symmetrical, although it was not statistically significant.
The study also examined sexual dimorphic facial measures -- i.e. how masculine or feminine a face appeared -- and found heterosexual men had overall more masculine features than did gay men. This, too, was used by the raters in assessing orientation; the more masculine a man's face was, the more likely he was perceived as heterosexual.
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