the problem is gonna be finding these extended versions . judging by the comments they ' re not very common <| sep |> Yeah it is better to be busy than not . <| sep |> I ' ve been noticing lately , almost as a rule , that any license plate starting with a ' C ' drives like they just polished off a 24 and their foot is glued to the accelerator . <| sep |> Well , for starters , scientists differentiate between sex and gender . Sex is used to describe the biological component , like genitalia and whatnot . Sex is tricky there ' s genetic reasons why people sometimes get both male and female genitals , or something between that requires surgery . Then , there ' s elective reassignment surgery or hormone therapy that in fact causes anatomical changes . Honestly , I ' m not interested to create a taxonomy of human sexuality , but suffice to say there are people who would take issue with your 3 way characterization . Gender is the mental complement to sex . Usually , men think of themselves as men and women as women , but when it doesn ' t match , we can use precise vocabulary to say the gender doesn ' t match the sex . It ' s harder to observe gender , but that doesn ' t mean it ' s beyond the reaches of science . We can ask people who they are , and that ' s one way we know there are people who have certain genitals who tell us they are not that sex . Why somebody ends up in that state is something I cannot claim to understand . So , I ' m not going to take a stance on gender and sexuality except to point out that there is a whole academic literature about it . There are many situations described in the literature that are not accounted for in your 3 sex model of sexuality .