With all due respect, I completely disagree.
As one who did martial arts for years and competed in tournaments, I can say that my aggressiveness increased once I got into uniform and stepped into the ring. As a former soldier, I can say my uniform gave me a feeling of invincibility I did not feel in civilian clothes. Even now, when I dress, I am more careful about my eating and more considerate toward my wife.
Does dressing change my sexual preference? Not exactly. I son't fancy men in any way, but I do find I fantasize about my wife walking up behind me and handling me as I do her when I am in drab mode. I would also be open to her being the man with the help of a toy, if you get my drift. This is something that I never fantasize about with me in drab.
Again, I think that it's different for everyone but I do not find a change in sexual preference due to clothing to be improbable, unlikely or impossible. I find it very much in the realm of possibility and can say I have experienced shifting preferences due to what I am wearing.:D