first off, not all women are interested in the 'bad boys'.

second off, not all men are gentlemen, even those who seem to be, may not be.

third off, this type of attraction to the 'bad boy' is not exclusive to women. men are certainly susceptable too.

and the reason why some people are attracted to the more 'risque' people is because the gentlemanly people will always be around and you can have them after you've had your wild days. just as there's always a tinge of regret at not having been rebellious/wild as after a certain age, society seems to think people should 'settle down' and live a quiet suburban life.