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Assessment of Sexual Behavior of Male Mice
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Robust evidence for bisexual orientation among men.

Jeremy Jabbour1, Luke Holmes2, David Sylva3

  • 1Department of Psychology, Northwestern University, Evanston, IL 60208.

Proceedings of the National Academy of Sciences of the United States of America
|July 22, 2020
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Summary

Scientific evidence confirms that some men possess a bisexual orientation, experiencing arousal and attraction to both sexes. This research supports the idea that male sexual orientation exists on a spectrum, including bisexuality.

Keywords:
Kinsey scalebisexualitysexual arousalsexual orientationsexuality

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Area of Science:

  • Psychology
  • Human Sexuality
  • Sexual Orientation Studies

Background:

  • The existence of bisexual orientation in men has been debated, with some skepticism regarding self-identification.
  • Previous research on male bisexuality has been limited by small sample sizes and inconsistent findings.

Purpose of the Study:

  • To investigate if men identifying as bisexual exhibit corresponding physiological arousal patterns to both male and female stimuli.
  • To provide robust evidence regarding the validity of bisexual orientation in men.

Main Methods:

  • A meta-analysis was conducted, combining data from eight previous studies.
  • The study included a large sample of cisgender males (474 to 588 participants).
  • Physiological (genital) and subjective arousal responses to erotic stimuli were measured.

Main Results:

  • Men who self-identified as bisexual demonstrated significantly more bisexual patterns of genital and subjective arousal compared to exclusively heterosexual or homosexual men.
  • The findings were highly robust, indicating a clear pattern of bisexual arousal.

Conclusions:

  • Male sexual orientation exists on a continuum that includes heterosexuality, bisexuality, and homosexuality.
  • Physiological arousal patterns provide strong support for the reality of bisexual orientation in men.
  • This research validates self-reported bisexuality through objective measures.