Autogynephilia is a very odd fetish. Yes the person is aroused over the idea of themselves as a woman. But it goes beyond make up and hair.
It permeates all aspects of women and their biology. Not just the superficial trappings. So menstruation is a big one. The autogynephile who is terribly sympathetic about your period pains. The one who is very supportive of your pregnancy. All arousing.
There are menstruation kits they can buy to imitate menstuation.
Also listening to women in the toilet is arousing.
But the part for me which is the worst is that it is a humiliation fetish. They get off on the idea of being victims. It's misogyny really because they see women as victims. They will often wear overtly 'girly' clothing.
Another aspect which is very irritating is that they convince one another that all women have this fetish. They say women look in the mirror before they go out and admire their dress/pumps and therefore they have AGP. Blurring the lines between admiration and arousal. I have been known to say how the fuck do you think we all get dressed for work every day, in that case?
It's interesting that people here are saying it is the beefy guys in badly applied lipstick. A fairly reliable rule of thumb would be someone who is older and doesn't 'pass'. The ones who look gay in perfectly applied make up are probably not AGP. I would say if your intuition is troubling you, you are almost definitely right.
I asked myself whether I find the fetish offensive in and of itself. It's difficult. Because it is misogynistic.
I can spot an AGP talking to me at 10 paces. But many women
and girls, won't realise that the person behind the screen is furiously masturbating while the woman is innocently discussing tights.