No female/female is 100% gay. Cus if two girls have sex, they are lesbians, and lesbians are gay.
Female/Male/Male is more gay than female/male cus the dick to vagina ratio is bigger, and you dont get an ekstra pair of tits as u get from a tranny.
Tranny/tranny should be 50% gay, cus its to men looking like females having sex. HOWEVER since they both are males, and if two men have sex they are gay, it is 100% gay. But it is better than watching female/male/male, cus when watching that u get two dick and one pair of tits. And with tranny/tranny u still have two dicks but 2 pair of tits.