Thanks.
Well, it’s pretty simple to me. I don’t believe it’s sinful to have a sex change due to strong sex dysphoria because of science. Science tells us that males and females have brain differences and that there’s all sorts of conditions and possibilities that can screw things up in the womb during sex formation. External physical features don’t tell everything about what a person’s sex is. You can look externally anatomically female yet have vestigial testes. Sometimes things just get screwed up. If you believe in the Fall, it’s not so hard to comprehend, imo. We suffer disorders and such, including congenital ones, because we’re living in an imperfect state and this imperfection extends to our genes and such.
The thing is that most people just don’t understand it because they’ve never had to deal with it. They’re just normal and it’s never an issue to them. Everything matches up. But we have to deal with it 24/7 because the disparity is glaringly obvious to us. Also, most people have a very black and white and scientifically ignorant view of biology and anatomy. It’s not always clear-cut and there’s biological shades of grey. Yes, most people are male
or female, but nature produces aberrations that have some level of both in one body. There’s so many things that can go wrong. (Actually, all people have elements of both sexes in them because we all produce the hormones of both sexes. It’s just that which hormone your body primarily functions on and which hormone has shaped your brain the most decides which sex you are.

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It’s like how people talk about chromosomes being the decisive factor for whether you’re male or female. That’s just wrong. For example, there’s a condition called Complete Androgen Insensitivity Syndrome where the fetus has an XY karotype yet their body doesn’t respond to androgens at all and so they develop as externally female. In fact, they tend to feminize even more than XX karotype females do because even XX females produce small amounts of testosterone which has an effect, yet CAIS females don’t respond to testosterone at all. So is the person with CAIS a man or woman?
For example:
youtube.com/watch?v=cJxZe4KAdqU
Is Katie a man or a woman? Is she sinning because she was born with a medical condition and had to correct it using hormones and surgery? Is her having relations with a man a sort of homosexual activity (she’s attracted to and has relationships with men)? Or even with me, I identify as a heterosexual man (I’m attracted to women) and I’ve never identified as a woman/female. So even after I complete my transition (with genital surgery), would that still be “lesbianism”?
See, this is where our views of things have to be reexamined in light of science. It’s like, I agree with natural law theory but it has to be modified to account for those who are intersex and transsexual (transsexualism may actually be a form of intersex, to be honest). There’s not many of us but we do exist and these things need to be considered. Current Church doctrine actually has little to nothing to say about this. It doesn’t fall under the teachings about homosexuality for what I would hope are obvious reasons. I’m not a woman, I don’t want to be a woman, I don’t want to act as a woman in a relationship/marriage. I want to be a husband and a father. I don’t want to be a mother or wife, because I’m not a woman.
Honestly, unless I chose to divulge it you, you would never know, anyway. I can get my name and gender marker changed on my legal documents and ID. I can change the gender marker on my birth certificate, too. So even if same-sex “marriage” was never legalized, I would still be able to have a legal marriage to a woman.
So this is quite a quandry, especially with respect to Church teaching. This is something they haven’t addressed and I hope they do.