Gender identity and the copulation instinct
I want to look into the male to female crossdreamer's longing for being the catcher instead of being the pitcher in the sexual act. From what I have seen, read and experienced one of the main reasons some men have feminization fantasies is that they look for emotional release for a female sexual instinct. I will also argue that you find the same phenomenon among some biological women. There are female to male crossdreamers who dream about taking the active male role when having sex with men.
"He likes girls. According to 'common knowledge', that makes him heterosexual. However, during fantasizing, he would sometimes take the female role. Doing this he sticks something up his butt. According to "common knowledge", guys who stick things up their butts for pleasure are homosexual. Following that logic, people who do both hetero and homo things are bisexual. As he used to explain it, his 'bisexuality' is an extension of his heterosexuality. But in his fantasies he was not playing the part of a male 'receiving' another male, e.g. gay. he was playing the part of a female receiving her male lover, e.g. hetero. Paradox again."
He coupled the idea of different mating or copulation instincts with the two dimensions of feminization and masculinization like this: