The enlargement of the pupils is accurate indicator for sexual arousal
The eyes can not hide your sexual orientation and the enlargement of the pupils is accurate indicator for that, according to a study at the Cornell University.
When people look at erotic pictures and experience sexual arousal, their pupils expand unconsciously. Thus, the orientation can be easily established.
The new study is the first large-scale experiment that shows the relationship between erotic desire and dilated pupils, says Rich Seyvin-Williams, a psychologist at Cornell.
If a man is straight, his eyes widen at the sight of women. If their are gay, it will be the opposite – their pupils will dilate, when looking at men.”
He and his colleagues recruited volunteer team of 165 men and 160 women, including hetero-, homo- and bisexual participants. Each of them watched video of masturbating man, masturbating woman and some “neutral” landscapes. The light was adjusted so as not to affect the eyes. Cameras were recording even the smallest changes in the pupils size, and volunteers had to tell exactly how aroused they felt after each video.
Heterosexual men reacted to images of women and gays – to those with men. Bisexual men responded to both.
In women, however, things were not so straightforward. Lesbians are excited at the sight of the same sex. But the pupils of heterosexual women are equally expanded with images of both sexes, although they reported greater arousal at the sight of men. This does not mean that heterosexual women actually have a dual orientation. Rather, their subjective arousal does not meet the body.
Reference to people whether an object excites them or not, does not lead to accurate results, because many people are ashamed to admit their desires or even deny them to themselves. Also, direct questions about sexual orientation are uncomfortable in many cultures. The test method for orientation by the pupils can help many people who have problems with finding their true sexuality, claim the scientist.