I agree but if you see overall...Most ...I mean Most Girls Buy into the "Bad Boy Persona"...more of which I think has to do with the Female Nurturing instinct of Being able to "Convert" The bad boy to a Nice guy.
i still reckon its immaturity. Its ones way of feeling better about themselves. to know that you have been able to convert someone per se.. i believe its something girls go through.. and guys know it too. They can reel a "good" girl in.. get her to listen to their problems blah blah blah.. but nothing really comes out of it..
at the end of the day (most girls) want someone nice to look after them. Be sensitive to their needs. Cuddle them and all the rest.. the other thing, i think this "bad boy persona" is over rated... most bad boys are nice guys neways.