Det finns en tendens, här och där, att se sexuell läggning som ett dikotomt fenomen. Antingen är man heterosexuell eller homosexuell. Kinsey betonade dock, utifrån sina observationer, att sexuell läggning bäst förstås som ett kontinuerligt fenomen. Som han uttryckte det i Sexual Behavior in the Human Male:

The living world is a continuum in each and every one of its aspects.

I linje med detta synsätt lanserade Kinsey-skalan, där sexuell läggning anges på en skala från 0 (helt heterosexuell) till 6 (helt homosexuell), och där man kanske kan betrakta 2–4 som en bisexuell läggning. Illustration:

Nu visar en ny studie, ”Robust Evidence for Bisexual Orientation in Men”, att det finns belägg för att vissa män är bisexuella:

Patterns of physiological (genital) arousal to male and female erotic stimuli can provide compelling evidence for male sexual orientation. (In contrast, most women provide similar physiological responses to male and female stimuli.) We investigated whether men who self-report bisexual feelings tend to produce bisexual arousal patterns. Prior studies of this issue have been small, used potentially invalid statistical tests, and produced inconsistent findings. We combined nearly all previously published data (from eight previous studies in the United States, United Kingdom, and Canada), yielding a sample of 474 to 588 men (depending on analysis). All participants were cisgender males. Highly robust results showed that bisexual-identified men’s genital and subjective arousal patterns were more bisexual than were those who identified as exclusively heterosexual or homosexual. These findings support the view that male sexual orientation contains a range, from heterosexuality, to bisexuality, to homosexuality.

Så var det klarlagt. Let’s show the bi men some respect.