(WARNING: Not Safe For Work; pornographic content.)

This section documents autogynephilia (AGP) in transgender males, i.e. sexual arousal from thinking of oneself as a woman, playing with the stereotype of femininity, etc.

Note: while the term "autogynephilia" comes from the Blanchard typology of transsexualism, we use the term more liberally here, not necessarily in connection with the typology.

Reddit's AskTransgender community

How do I stop getting erect when I crossdress?

Note the community response. Many people admit to having the same experience. Of course, this is accompanied with flat-out refusal to admit it being a kink.

Did sissy porn make me trans or was I trans all a long?

Again, people admit to having the same fetish yet at the same time deny that it proves anything...

Various fetish websites

Club Sissy: SRS/Hormones/TS

Club Sissy is a sissy fetish website that contains a section on transitioning via surgery and hormones.

Sissy Social: Hormones and Medical

Just like the previous, this is a sissy fetish website with a section dedicated to transitioning.

The House of Sissify

And another sissy fetish website that has a dedicated trans section.

From looking at the linked page alone, one may almost be led to believe that the website is simply a transgender website that happens to use the term "sissy" and is not a fetish website, because it contains many serious resources about transgender issues like deaths and morbidity, but when we visit the home-page...

The House of Sissify is built upon a solid foundation of strict sissy training, discipline, forced feminization, and most importantly – a place for you to be your true self.

Ouch.

The Lipstick Fetish Forum

This forum seems to fetishize lipstick in particular. It has a section that isn't overtly about transitioning, but nevertheless contains people who identify as transsexual.

Black to White member "cuckyboi4BBC"

(Since it's a public profile, I hope it's acceptable to link to it.)

"Black to White" is mainly a cuckold fetish website, which fetishizes black men in particular. That is, white men get sexual arousal from watching their girlfriends or wives having sex with or getting sexually dominated by black men. Obviously, this plays into the racist stereotype of the overly virile black man.

For some members, the fetish is associated with a sissy fetish as well. The above link leads to one such member's profile. His tattoo makes it abundantly clear that he identifies as trans. For those wondering: the abbreviation "BBC" which appears in his forum name means "big black cock", a term stemming from pornography. I.e. the name reads "cucky boy for big black cock" meaning he desires sexual domination by black men.

4chan's LGBT subcommunity

/lgbt/

This is a very fast-moving forum where old entries are automatically deleted, so there's no direct link to evidence. (Archives exist, but at present I'm too lazy to dig them up.)

Nevertheless, at almost any point in time, taking a walk through the forum will reveal people who explicitly identify as autogynephiles (though it's unclear how many of them identify as trans), people who openly fetishize sexual submission in connection to transgenderism, and other such things.