Its the "go ahead" for creeps that want to take advantage of you (Want to have sex with you). Some people don't see this fact and seek attention and/or love from guys that always lie about that. A friend of mine has the same problem but doesn't see it. I think its good for you that you noticed it, just be really careful when selecting partners. They don't care about you at all. Bottom line, those kinds of guys WILL use that fact to get you in bed.
Generally it refers to a woman that didn't receive enough love, respect, or affection from their father while growing up. This often manifests in early adulthood as a preoccupation with gaining affection from men, often older men that share characteristics with the woman's father.