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Research confirms men with older brothers are more likely to be gay, suggesting same-sex attraction has a biological basis

  • Written by: Francisco Perales, Associate Professor, School of Social Science, The University of Queensland
Research confirms men with older brothers are more likely to be gay, suggesting same-sex attraction has a biological basisShutterstock

New research shows having a greater number of older brothers increases the probability of a person entering a same-sex union at some point in their lives.

This finding, detailed in our paper published today in the Journal of Sex Research, offers a rare insight into the origins of sexual orientation.

The origins of sexual orientation

In...

Read more: Research confirms men with older brothers are more likely to be gay, suggesting same-sex attraction...

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