When your friend just can't find a "good guy"...

[draw2much]

Have you ever experienced this? You have a friend who's smart and fun and you enjoy being around her but she's really REALLY bad about the kinds of guys she picks to be in a relationship with. Like, so bad you start worrying for her safety. How do you counsel a person like this? What do you do if she ignores your advice? And why do you think women pick guys who turn out to be jerks?