So gender and sex are often said to be two different things. Sex is biological, whereas gender is more of a social construct that is assigned to members of each sex. A person's gender identity is then how they relate to this social construct, how they see themselves in this dynamic, and how they express themselves in relation to gender norms and aesthetics. However while there is some variation we cannot deny that gender and biological sex are intrinsically related. The correlation between biological sex and gender is something on the order of 0.98 or more, and between gender and sexual orientation, there is a correlation of at least 0.95. mean that for example of people born with penises >99% of them will call themselves men and >95% of them will be attracted to women. With such strong correlations it would be wrong to say that sex, gender, and sexual orientation are all very related to one another despite what gender activists might like to imply, that it is all just social construct. In my opinion there are only two genders despite what PC warriors like to say. Most transgender people are also part of this binary, they simply want to be the other gender. That said there is a sort of spectrum regarding what is masculine and what is feminine, that is there are masculine women and feminine men, but there is no such thing as a third gender or o someone with no gender or whatever nonsense snowflake types are comming up nowadays.