Well I am in a hostile DADT situation (and the marriage may very well be over because of it), and have been cut off of sex as a result, and yes it's because I didn't turn out to be the manly man she desired, even though I came out to her well before marriage and she seemed to like me precisely because I was not a typical "macho" male.
But I am by no means asexual; I still have erotic thoughts, and masturbate regularly (whether en femme or not; it's not connected to my presentation, but to my horniness). Yes with age my libido and erectile capacity have declined, but not enough to completely erase sexual desire. I am not, however, particularly interested in finding another sexual partner, whether I stay "married" or separate. At least not at this time. If ever I do, it's bound to be hard finding a woman interested in a person with gender dysphoria.
