So I recently learned that science has actually shown that there are more than just two sexes…
So you were recently
told*, and believed what this person told you. (Perhaps it happened in a formal educational institution, and that’s why you were inclined to believe what you were told there? Or you read it in a book from a source you usually trust, or heard it from a person you generally consider reliable, and that’s why you believed what you were told?) What source did you hear this from, and why do you consider this source trustworthy to make declarations as grand as there being more than two human sexes?
So how do us Catholics deal with this discovery
There has been no such discovery. Catholics were already aware of intersex and related phenomena, and while further developments of chromosomal science are as fascinating as most branches of science, what you seem to consider the key “discovery” (not the presence of genetic abnormalities among some individuals, but the interpretation of ideologues that we should call everyone who lives with an abnormality a fundamentally new type of human) is mere ideological interpretation. It’s not a ‘fact’, it’s part of a belief system embedded in a series of ideologies heavily invested in pushing for the general collapse of all sense of boundaries, categorization, and objective morality, so they can remake the world in a new image (which is whatever they’ll feel like at the time).
You need an XX and XY to create new life, which is what sexual reproduction is.
There is no “third” configuration needed to create life.
Therefore, there are only two sexes.
I think this is key to the whole question.
‘Gender’, though a word abused by ideologues these days who try to drag it into meaning merely surface cultural or social role occupation, points obviously towards biological realities, because of the root ‘gen’:
Gender refers to the
genitalia by which each human participates in
generating the next
generation of the human species.
We can identify a human gender by identifying which role they would biologically play in generating the next generation of humans, if their body were in good health. A woman being infertile doesn’t make her less a woman. This stays true if her infertility is related to a chromosomal issue. And if a given chromosomal issue doesn’t even cause infertility, that allows it to be even more obvious.
Anyway I’d agree with Scarlett’s point. The key seems to be that gender is about generation. There’s no such thing as a true third human sex unless it effectively occupies a brand new third role in procreating new humans. Unless it does that, mere infertility doesn’t count. And even if external features may seem confusing, if fertility is present? It’s certainly going to either manifest as insemination (the proof of maleness) or effectively nurturing the baby in the womb (femaleness).