"...that means less than one in five prospective girlfriends are smokers."As you probably know, those down & dirty stats are likely underestimating your odds of finding a smoker. I'm pretty sure that singles smoke more often than married women. Also, those that are trying to attract men, date regularly, go to bars, and have sex regularly are also more likely to smoke.
Sure not as many people smoke as once did, and many that do smoke a lot less, but fetishes have become acceptable at the same time. So if you do find an attractive smoker who likes you, you are far less likely to be thought weird if you reveal watching your lady smoke turns your crank.
I would go so far to say, that the odds of finding an attractive woman willing to incorperate smoking into sex has never been higher. Also, internet dating has openned up a second front in ways to meet attractive women who smoke.
I wish you luck in love & life,
j2