In the 1960s, the Canadian government commissioned a series of homosexuality tests known as the fruit machine.
The fruit machine consisted of a series of questions, a chair resembling one you might sit in at a dentist’s office, and flashing images of mundane scenes contrasted with pornography that people in the ’50s thought gay people would like — think: half-naked carnival strongmen. Subjects (who were told the machine was measuring stress) sat in the chair and watched the images while scientists noted their pulse rate, skin reflexes, breathing rate and pupillary response.
In 1988, Texan judge Jack Hampton sentenced a man for 30 years for killing two gay men instead of life requested by the prosecutor. He justified it by stating “I put prostitutes and gays at about the same level … and I’d be hard put to give somebody life for killing a prostitute.”