A new study, “The Eyes Have It: Sex and Sexual Orientation Differences in Pupil Dilation Patterns” from researchers at Cornell University, claims that optical reflexes reveal a person’s sexual orientation.
This is the first large-scale experiment to show that pupil dilation matches what people report feeling turned on by, said study researcher Ritch Savin-Williams, a developmental psychologist at Cornell University.
Comprising of 165 men and 160 women, including gay, straight and bisexual participants, the study participants watched one-minute videos of a man masturbating, a woman masturbating in from of neutral landscape scenes.
The pupils of Gay men responded to sexual images of men, bisexuals responded to both men and women, but women were more complex, responding to both. No, not all straight women are secretly bisexual, but Sex researchers aren’t sure why straight women dilate basically equally in response to erotic images of both sexes.
One of the findings I find more interesting than others, is in the area of bisexuality. One of the hypotheses in the study was: “Bisexual men will show greater pupil dilation to both male and female sexual stimuli compared to heterosexual and homosexual men.” The study stated that the results supported hypotheses.
‘In general, self-reported sexual orientation corresponded with pupil dilation to men and women. Among men, substantial dilation to both sexes was most common in bisexual-identified men.’
The next phase of the study would be monitoring pupil measurements and genital measurements simultaneously, though researchers admitted some subjects get a little squeamish having their genitals under scrutiny.