See, I think that's the crux of it, and I was also taught about the sidewalk bit, and notice when it is done. The little things like holding doors and walking on street side ARE charming; I don't consider them NECESSARY as in something that all men are supposed to do for all women, but still CONSIDERATE. If someone doesn't hold the door, I don't care if it's a man or woman, it's just kinda irritating when the stupid thing swings back in your face.