Photos of identical twins as children are being used in a controversial study by scientists at the University of Essex who are asking strangers to guess the sexual orientation of those in the photos, now adults.
The study reinforces sexuality stereotypes and societal constructs of gender.
Those who were asked to guess the sexuality of the people in the photos did not know the purpose of the experiment and were asked to guess based solely on appearance and body language in the photos.
The study of identical twins, where one identifies as queer and the other straight, is in an effort to understand whether it is nature or nurture that plays a part in sexuality.