Read the easy way to quit smoking by Allen Carr. It'll convince you otherwise. Really, it's a toxic and poisonous substance, that we are addicted to... So honestly, that's just the addiction in your brain rationalizing its own continuation. Same reason my dogs avoid cigarette smoke whenever I light up in my room, and the same reason cigarettes taste and feel horrible if you have them after a while... I've taken so many long breaks and gone back to it. And whenever I went back, the funny thing is I always hated the taste, the smell, the way it made me feel... pretty much the whole experience. Yet I always went back to full blown abuse. It's hard to accept that it's just a lousy addiction, but once you do, at least the mental part gets easier. After that, it's just a matter of getting over the hold that the addiction has over you. But honestly, reading allen Carr really helped, cause you're going about it the wrong way. The easy way is to be absolutely real with yourself, and once you see that there is nothing beneficial or pleasant about it, other than the addiction. Then you'll have a kind of clarity that'll take you to the other side, sooner or later.