So lemme get this straight...
A man dressing up as and pretending to be a woman and capering around in the ladies' room is perfectly fine, normal, and, in fact, the mere thought of questioning such a thing raises suspicions of sexism, about 5 other "-isms" and a baker's dozen of "-phobias".....
But, a man dressing up as and pretending to be a woman for Halloween, is offensive.
Got it.