It's amazing where fantasy can take a person, Sandra. I think it has to do with the whole role playing thing ... which renders having a vagina almost unnecessary.
How did you classify sentiments like "Yes, I've had those feelings too" if they didn't say they tried it, or didn't disclose they tried it and it burst their bubble. I know people who fantasize about it but who were turned off by the actual experience of being with a man. So there's a category you didn't list, which is those people who are more turned on by the idea of being a sexual woman than having any real attraction to men (or perhaps even women). I think that being predominately autosexual is a different category than heterosexual, bisexual, or homosexual, although few people would be willing to classify themselves that way.