You don't understand because a) you're normal and b) you don't have a clinical background. I mean, while my areas of specialty don't include psych per se, I have been around long enough to encounter some majorly fucked-up individuals. Take care of a Munchausen's for a few days, and one comes to realize the lengths that an ill person will go to for attention. Compared to somebody who is willing to rub feces into an iv site in order to prolong a hospital stay, she's an amateur at attention-seeking.