Interesting..
My experience may just be due to my own anatomy, I was born with a vagina, but had FTM surgery as an infant, then vaginal reconstruction as an adult..
What I found was that while HRT changed my perceptions, nothing prepared me for the realities of the splicing and dicing of tissues and nerve-bunching and the re-mapping of mind/genital/functional realities.
I had my first vaginal orgasm 11 days post-op. Almost had a big clitoral orgasm a few weeks later, but I got antsy, and 'lost' it. It wasn't until 6 months later that I had a big clitoral orgasm, and then they became easy to achieve.
For me, there are two things involved. One, being warm and cozy and wet and feeling nice and relaxed and safe and happy and calm. The other is mental, I need to be in sync with a pleasant emotionally stimulating experience. I can't just watch porn, I have to be able to feel like I am the reason the guy has a woodie, that he is into me, and that I am pleasing him. Once he starts to 'do his thing', out of nowhere, my vagina has a sympathetic reaction, and we 'sneeze' together, lol. Without visual aids, I have to be thinking about somebody I really like, not just lust after.
For me, orgasm seems to be about being with someone when they are climaxing, not witnessing something on a screen, nor simply masturbating myself, nothing merely mechanical suffices...
I guess it has to do with feeling like I am giving something to somebody, rather than taking something...
Maybe that's just me, I dunno..
Missy