Ever the consumate, professional that he is, Christian Bale will do many things for his art, including smoking cigarettes on screen, but he does not consider himself a smoker. Just like he said he would do nudity if the role called for it.
Of course, the danger of that approach to cigarette smoking is that you’ll become hooked even though you don’t want to. Cigarettes are insidiously addictive, and will get to you when you’re the weakest. Still, kudos to Christian Bale for maintaining a non-smoking approach and overall lifestyle!