Bad gurlsssssssss

what is it about guys and bad gurls that i dont really get? How come they actually prefer those that dont want them and insults them than the good gurls that are willing to go the extra mile with them? I had an opportunity to meet an old friend that took all my effort for granted but here was his new gurl shouting at him and all he could do was apologise and explained, how come he never appreciated it then when we were together? Does it mean one has to be bad to enjoy a relationship? Thinking of the whole thing I just remembered this from a top I once had "good girls go to heaven bad girls go everywhere"