Kurt Freund’s research on one aspect of this field of study led to the development of the PPG device. A book titled for this field “in the Cultural Struggle” analyzed the failure of the bourgeoisie to reform this field in the Soviet Union and was written by Frankfurt School thinker Wilhelm Reich. Therapies targeting disorders in this field were developed by a research team that studied the role of Bartholin’s glands; that team is Masters and Johnson. To test (10[1])the ideas of Eugen Steinach, (10[1])the first institute to study this field was developed by Magnus Hirschfeld in Berlin. (10[2])Alfred Kinsey’s research in this field (10[1])led to the development (10[1])of his namesake scale. For 10 points, name this field sociologists study to compare outcomes between straight and gay people. ■END■