If he can change gender feelings over a couple of years, why not change feelings over a couple of months, or even every day?
I suspect that there are quite a few womyn that change their identity over the course of every month during peak breeding years, and even after that.
/ducking ...
Check this math. I've heard Bruce is considering transitioning back to a man because he is attracted to women and thinks it is wrong for a woman to sleep with another woman. I heard that on the radio and almost drove off in the ditch when my WTF? processor got stuck in a loop.