i.e. dumb bitch syndrome. Usually DBS sufferers have feelings of love for actual pieces of shit and/or assholes, believe that they can change the person into the 'perfect guy' (which makes absolutely no fucking since), or choose a bad guy over someone who would actually treat them right for once in their life.
FACT: DBS sufferers love to be treated like shit and physically/mentally abused even though they would say otherwise.
Guy: I love you. I want 'us' back.
Girl: But you lie to me and fuck with alot of girls, also you have herpes.
Guy: I will change.
Girl: I believe you, I love you too.
Me: Wow, she must suffer from DBS.