My sister just told me she has diagnosed herself (she's an internet doctor) with a condition called Cyclothymia, which is kind of Bi-Polar Lite. If you look at the list of symptoms, pretty much everyone on the planet has them from time to time.

Looking at some of them a little more closely makes it seem like this disease was thought up by a remorseful slut who was trying to justify their actions: low self-esteem, self-destructive thinking, risky sexual behavior, shopping sprees, tendency to be easily distracted, inflated self-esteem, being inconsiderate of others, feelings of regret.