Australian High Court recognises third category of sex

[Sobotnik]

[QUOTE=Mingebox;44442285]Surely it's not all biological though?[/quote]

Trans brains are different to both male and female brains.

[quote]I mean you have people who could have been said to he literally born into the wrong body, but people who have a personality typical if thier sex, but identify as the opposite?[/quote]

Transsexualism is the result of a biological developmental cause that no amount of upbringing can change.

[quote]Or a personality typical of the opposite, but still refer to themselves by their sex? Why do some feel the need to adopt the appearance of the opposite sex and some don't?[/quote]

See above.

[quote]And where do "other" genders fit into sexual dimorphism?[/QUOTE]

They don't because humans are pretty sexually dimorphic. There's a few rare mutations which come under the blanket of "intersex" though.