I think that when a girl becomes overly conscious of her beauty, and the fact that it can be used to manipulate [most] men, she loses that sense of a true, sincere love. It just becomes a game of physical attraction for her. Very rarely that sense can reawakened, but only when she realises that someone might be interested in her not because of her beauty but because of her character. It is not very common, because such girls tend to have a flirtish character; not an attraction for most character-seeking men.