I'm glad I'm past this stage.
I'm more to the point that I get kind of weirded out when people will refer to me as a male. It is only at work that it happens, because we have very androgynous uniforms, and I often just roll out of bed, and go there without doing much to my hair, and not wearing any makeup, but even then, my hair is really long, I have a name tag with the name "Sarah", and just in general I don't really understand why they would think a male would look like me or have my name. So I usually just ignore it and go on about my business. Because it's really only a certain percentage that it happens for. It doesn't really invalidate me as a woman if some strangers call me a boy from time to time. So long as they don't get upset about it and do something violent, then they can say whatever they want. It's nothing to do with my life. I like how I look, and so does my girlfriend, so what more could you want?
Plus frankly it's safer for me if people think I'm a boy at work, or at least don't find me attractive. I've had guys grab my ass at work, and I work alone, so that's really scare. and I get hit on a lot. So I try not to look my best for work, if nothing else than to be safe. But mostly because I don't really care about how I look at my job. It's so unimportant.