The sex of an individual is determined by a pair of sex chromosomes (gonosomes).

Males “ARE” XY:

Males have two distinct sex chromosomes (XY), and are called the heterogametic sex.

Females “ARE” XX:

Females have two of the same kind of sex chromosome (XX), and are called the homogametic sex.

So STOP being an IDIOT and saying you are a girl, or that you are Napoleon, because then “MEANS” you need Psychiatric treatment!