Njengokuqinisekiswa "kobuzalwane" bomtsalane wobufanasini, abagqugquzeli be-LGBT bahlala bebhekisa kubo kufunda Isazi ngemithambo-luvo uSimon LeVay osuka kwi-1991, apho wafumanisa ukuba i-hypothalamus yamadoda “athandana nesini esifanayo” ilingana naleyo yabasetyhini, ekucingelwa ukuba ibenza amafanasini. Yintoni ngokwenene eyafunyanwa nguLeVay? Into angazange ayifumane ngokuqinisekileyo yayilunxibelelwano phakathi kwesakhiwo sobuchopho kunye neendlela zokuziphatha ngokwesondo.