Proves my point -- your girlfriends are judged much more harshly for how you're dressed than you yourself are -- which is silly, absolutely ridiculous. I'm assuming you're a grown man, right? Why does it make sense that people would judge your girlfriend for your attire and not you, a man who presumably dressed himself? It's nuts.
But couldn't part of this be that judging him for it won't actually change anything? If a guy doesn't really care about how he's dressed then you can judge him as much as you want, but he'll still keep on dressing the same way. Social pressure only works if people care about it. And somebody else above mentioned that people are very good at picking out others who bend to social pressure.
Who said anyone else is judging me or my partner? And why are you assuming that anyone is judging either of us? Just because someone believes something is happening doesn't make it reality.