Fun fact: fetishes develop as a reaction to desires that mix with lust around the onset of puberty.
This said, it's reasonable to believe that AGP develops as a result of the idea that you want to be a girl as puberty hits.
Continuing from this, it's very common for people to point to the beginning of puberty as the first time they felt dysphoric. Would it not be reasonable to say that AGP is a potential result of the onset of dysphoria mixing with the onset of puberty, in some horny mess?
Interested in your thoughts.