If you just skim through their hobbies, interests, the type of things they mention, all men kinda fall within the same lines and all women fall within their group. I found this even applies to trannies, the trannies all have the male interests and the female trannies have the female interests. The only ones with female brains are the biological females even when they're trans.
Just go browsing dating subs if you want to see for yourself, don't need a study or scientific journal to permit me to think it. It's observable. That said I would fuck a hot tranny, yes its gay.