That’s because “Gay” is ALL they are, it’s the primary, and usually only means they use to identify themselves.
I firmly believe that a primary reason of the mental aberration known as “homosexuality” is rooted in an unfulfilled hyper sexuality where the only “acceptable” outlet is in the homosexual community. This is the reason that “sex” is used as a primary means of self identification, and why “sex” is a component of their every action.