In the 1970s, the symbol of the pink triangle highlighted the need to research the persecution of homosexuals during National Socialism and to change public attitudes towards them through public provocation. History, criminal law, sociology, and the public - these are the four main themes that the contributions in this volume focus on regarding the topic of homosexuality. Among the authors are Thorsten Benkel and Michael Bochow, Fritz Sack, Volkmar Sigusch, and Kurt Starke. The "K" in the middle is represented by Elmar Kraushaar and Marita Keilson-Lauritz, while "L" for Lautmann is absent. This volume is dedicated to him on the occasion of his 80th birthday.