Humphreys is best known for his published Ph.D. dissertation, Tearoom Trade (1970), an ethnographic study of anonymous male-male sexual encounters in public toilets (a practice known as "tea-rooming" in U.S. gay slang and "cottaging" in British English). Humphreys asserted that the men participating in such activity came from diverse social backgrounds, had differing personal motives for seeking homosexual contact in such venues, and variously self-perceived as "straight," "bisexual," or "gay."
Because Humphreys was able to confirm that over 50% of his subjects were outwardly heterosexual men with unsuspecting wives at home, a primary thesis of Tearoom Trade is the incongruence between the private self and the social self for many of the men engaging in this form of homosexual activity. Specifically, they put on a "breastplate of righteousness" (social and political conservatism) in an effort to conceal their deviant behavior and prevent being exposed as deviants. Humphreys tapped into a theme of incongruence between one's words and deeds that has become a primary methodological and theoretical concern in sociology throughout the 20th and 21st centuries (Deutscher, 1966).
Humphreys' study has been criticized by sociologists on ethical grounds in that he observed acts of homosexuality by masquerading as a voyeur, "did not get his subjects’ consent, tracked down names and addresses through license plate numbers and interviewed the men in their homes in disguise and under false pretenses." It was later speculated that he participated in the homosexual acts himself in order to gain entrance into this subculture....Continua