German: Institut für Sexualwissenschaft (Show more) Institute for Sexual Science, German research clinic and medical practice in operation from 1919 to 1933 in Tiergarten, Berlin, known as the first sexology institute in the world. The Institute for Sexual Science assisted thousands of individuals with counseling, sex education, treatment for sexually transmitted infections (STIs), and other concerns regarding sexual health; many patients received care at no cost. The institute also was the site of some of the first feminizing genital surgeries, which helped open the way to modern advances in gender-affirming surgery. During the time that the institute operated, homosexuality between men was illegal according to Paragraph ...(100 of 622 words) Access the full article Help support true facts by becoming a member. Subscribe today!