I disagree.
The reason I say that is that none of the people in question have been diagnosed as AGP. The armchair diagnoses are based on two things: sexual attraction to females and aggression.
...
AGP is a paraphilia for seeing oneself as a woman, particularly in a sexual situation.
AGP is a paraphilia expressed as sexual arousal at the image of oneself as a female, and/or sexual arousal at other people treating them as a female - which includes being aroused at being allowed into female-only spaces and transgressing sex-based boundaries.
The armchair diagnosis is also, by the way, based on the absolute craptons of self-declared transgender males writing copious screeds about how arousing it is to wear female clothing, and how hard their ejaculations are when they masturbate in female clothing and undergarments, how hot and sexually exciting it is to be in female restrooms, and how they can't help rubbing one out while they're in there, how sexually thrilling it is be in a cubicle next to a female who is changing their tampon and how hard it makes them.
Also supported by the shocking volume of self-taken videos of males in feminine-ish clothing masturbating in female spaces and then uploading them to porn sites.
My overarching point here, is that I think Blanchard has things backward.
I think AGP is a logical symptom of dysphoria/trans-ness rathere than the cause.
And I think it's perfectly logical that a dysphoric person envisioning themselves in a matching body is going to feel aroused. Because the fantasy of having said body would include having a body that would be capable of experiencing sexuality in the way they believe they are meant to experience sexuality.
I hate to take examples from fiction, but I'm reminded of a scene in the first book of the Thomas Covenant series. (High fantasy series I read in junior high.) The main character is a leper who has lost his sexual function due to his leprosy. In the story he is transferred to a magical realm and is suddenly healed. Having his vitality suddenly restored, he rapes the girl who is with him. (Which is out of character for him otherwise.)
I know that's an ugly scene from fiction and you are wondering: "WTH does this have to do with the topic?" My point is that I think what Doinaldson illustrates in that scene is the psychological response to gaining "correct" psychological function. Not that it would trigger assault or anything so dramatic. Just that gaining that function in and of itself is arousing.
The arousal you describe can also be attributed to envisioning themselves in a body where, like Covenant, they have gained the sexual function that was previously absent.
Covenant wasn't aroused by having the ability to be aroused. They were aroused by
Lena. One can argue that the unexpected physical manifestation of arousal overloaded their ability to control themself, but it's still not true to say that Covenant was aroused by being able to be aroused.
With respect to Dysphoria and AGP... Dysphoria is NOT a cause. A large part of why it was reclassified in DSM5 is that it is a common symptom that can be related to multiple different causes, including a deep-seated psychological disconnect from one's sexed body. AGP, on the other hand, IS a cause of dysphoria. AGP is a primary diagnosis of a mental health disorder under the category of paraphilias, specifically related to transvestic fetishism.
AGP can cause dysphoria, although a great many males with AGP are content to feed their paraphilia with simply cross-dressing and don't experience dysphoria at all.