I don't have any interest in men. When I'm deep in a Pink Fog my wife doesn't hesitate to remind me 'I married a man', and I thoroughly enjoy everything about the 'guy' expectations she has. But she knows, and relishes, the fact that I have a complex and non-traditional personality. Marsha is how I express my feminine, and usually submissive, traits. Her force-of-nature personality lets her be very comfortable as Marsha's dominating Madame when she wants to.
I questioned myself about why I exclusively watch lesbians when I view porn. I realised it's because I want to be one of the women, especially if it involves submissive behaviour. I very strongly feel that if I were a GG, I would be a lesbian myself.