+A minority of male-to-female transsexuals exhibit lifelong sex-atypical behavior and interests, are attracted to men, and transition early in life. Essentially, these are physiological males whose psychology is so far outside of the male normal range that they find themselves more comfortable and socially successful living as women rather than as extremely effeminate gay men. This likely _is_ a brain-intersex condition: [along with non-gender-dysphoric gay men](https://en.wikipedia.org/wiki/Fraternal_birth_order_and_male_sexual_orientation), they [have a statistical preponderance of older brothers](https://link.springer.com/article/10.1007%2Fs10508-011-9777-6) which is [theorized to be due to the mother's immune system response to male fetuses affecting the development of later pregnancies](http://www.pnas.org/content/115/2/302).
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+However, the majority of male-to-female trans people in Western countries do not fit this profile. They are attracted to women or are bisexual and, while reporting a desire to be female dating back to puberty or childhood, their lives tend to follow broadly male-typical trajectories prior to transition. In contrast to the "early-onset", androphilic type of gender-dysphoric males who couldn't fit in to the world as men if they tried, this second group of "late-onset", non-exclusively-androphilic gender-dysphoric males _can_ function socially as men, we just—aspire to a higher form of existence. (I think I'm justified in counting myself in this taxon even though I'm [choosing not to transition](/2017/Sep/hormones-day-156-developments-doubts-and-pulling-the-plug-or-putting-the-cis-in-decision/).)
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+This proposed two-type taxonomy of MtF trans people is very controversial, probably in large part because it is theorized that the non-exclusively-androphilic type is rooted in an unusual sexual interest termed _autogynephilia_ ("love of oneself as a woman"). Anne Lawrence, herself a self-identified autogynephilic transsexual, iconically describes autogynephiles as ["men who love women and want to become what they love."](http://annelawrence.com/becoming_what_we_love.pdf)
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+A review of the empirical evidence for the two-type taxonomy is beyond the scope of this post. To interested or skeptical readers who only have time to read one paper, I recommend Lawrence's ["Autogynephilia and the Typology of Male-to-Female Transsexualism: Concepts and Controversies"](http://unremediatedgender.space/papers/lawrence-agp_and_typology.pdf); for a more exhaustive treatment, see the first two chapters of Lawrence's monograph [_Men Trapped in Men's Bodies_](https://surveyanon.files.wordpress.com/2017/07/men-trapped-in-mens-bodies_book.pdf) or follow the links and citations in [Kay Brown's FAQ](https://sillyolme.wordpress.com/faq-on-the-science/).
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+To avoid getting mired in _unnecessary_ controversy, for the purposes of this post, I'd like to emphasize that it's possible to reject the hypothesis that autogynephilia is the _cause_ of the second type, while [still agreeing that](https://thingofthings.wordpress.com/2017/04/18/against-blanchardianism/) there observationally seem to be _at least_ two types of trans women, with the late-onset/non-exclusively-androphilic type or types being less overtly feminine and not sharing the etiology of the early-onset/androphilic type. We could perhaps imagine a gender identity "switch" in the brain that can get flipped around (explaining the eventual need to transition) without much affecting most other sexually-dimorphic parts of the brain (explaining how transition could be delayed so long, and come as such a surprise to others).
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+This hypothesis is weaker than the strong autogynephilia theory, but still has implications for the ways in which transgender identity claims might or might not be validated by natural, prediction-motivated categorization schemes. If most trans women's traits are noticeably _not drawn from the female distribution_, then it becomes less practical to insist that others categorize them as women.
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+To this it might be objected that there are many different types of women. Clusters can internally have many subclusters: Pureto Rican women (or married women, or young women, or lesbians, _&c_.) don't have the _same_ distribution of traits as women as a whole, and yet are still women. Why should "trans" be different from any other adjective one might use to specify a subcategory of women?
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+The problem is that—under the two-types hypothesis—most trans women aren't
+
+[...]
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+<a href="/images/genderspace_cluster_choice.png"><img src="/images/genderspace_cluster_choice.png" width="479" height="379" alt="genderspace cluster choice"></a>
+
+[...]