The paradox of pleasure

So why does everything (okay, most things) that is bad for you feel so god damn good? I've been thinking about smoking a lot these days. And it's great to be rid of cigarettes. You run faster, run longer, work out harder, etc. You don't REALLY gain weight if you make a conscious effort to control your eating habits.

But I just miss the action of smoking. Having a little something to inhale after a meal, or when I'm bored. Due to the lack of vices, I think I might just pick up cancer sticks again. Although it might be bad.