I'm no LV expert but I personally don't go by these "rules". I just carry my bags whenever and however I like it. I just make sure I don't carry fakes, that's all.On the chinese onlien forum, people all have diffrent thought about this question.
some people say girls in their early 20's should not carry a LV, becasue they are not mature enough to for the LV, Lv is for the sophisiticated successful business woman which i'm not. they said when you use a LV bag, you should always wear make up(which i'm not) and you should not take bus (which i took it all the time) (i'm sorry if this post bother you, this is not my poinion)