In biology there's this thing - genotype vs phenotype.
Easily adapted here:
Sex (genotype): this (medically certified)
Sex (phenotype): this (or that or that other one or undetermined or whatever - to each his own)
In this brave new world I'm sure someone will soon come up stating "I'm a 73%-27%" or "64%-36%" or "x% - (100-x)%" now that simply stating "non-binary" is already passé.
It's time for exact science.
...
Gah.
Phenotype def. posted on the web -
the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.NOT - the best description, basically, variations possible
within a genetic constraint.
So, exact science?
Pretty much.
Sex is
completely controlled genetically.
One chromosome is contributed by your mother and is always X, the other is from your father and can be X or Y.
Got a Y chromosome, you are a male.
Males are not males because they look like males (nor are females women purely because they appear to be).
Phenotypes? Well, they don't actually play a role in this.
There are some 'mistakes' that occur occasionally (hermaphrodites, men born that physically appear to be women but have blind vaginas, etc), but the basic template is uniform for all mammals.
Now the psychological aspects of our sexual identity? That's far more complicated.
But to make an old observation, "You can't make a silk purse out of a sows ear".
To clarify this, cosmetic alterations do not change an organism's nature.
And an inverted penis is not a vagina, its just a mutilated sex organ.
I'm OK if you want to make body alterations, just don't try to force me to join you in your belief that you've altered yourself into something you
can't be.
After two semesters of biology and one each of anatomy, physiology, genetics, and psychology (all of which are subjects that affect this discussion), I'm pretty comfortable with taking this non-PC stance.
Because it IS based on science, not someone's personal 'feelings' or belief.