Okay, I did a full-blown job of answering you, though I didn't want to. Now, I want you to go along with me and try a thought experiment. Not many people will do this, and (so far as I've found) very few will do it honestly, or without posing so many caveats that the experiment becomes meaningless. Still, I gave your challenge my best -- I hope you might do the same.
I don't know your gender, but for now, I shall assume it is male. (If I'm wrong, then you'll have to reverse everything throughout the experiment -- but note, I'd like any other male who reads this to try the experiment for themselves, and respond here.)
Here is the scenario: you are a heterosexual male, but an evil scientist with the most brilliant surgical skills has abducted you, and having placed you under general anaesthetic, has transformed your body -- your face, your genitalia, even your internal sexual organs and glands -- so that your are now a very, very attractive, unmistakable (without doing a DNA test) woman.
On waking up from surgery, you are instructed by this evil genius to "go out and live as a woman. Find yourself a good and handsome man, learn to live your sexual life more submissively on your back with an active male doing what comes naturally to him on top of you. And above all, be happy."
Now, the question in this experiment is this: since your whole body was transformed, but your mind left unaltered, how would you go about training your mind to accept this new truth about "who you are, and how you should behave" so as to fit into the world as you always understood it before? And above all, be happy?