system
Given the following post, respond as if you're commenting on Reddit:
human
[VTM] Do vampires smoke just to look cool?

No breathing, presumably they don't fall prey to nicotine addiction, yet lots of vampires smoke.
gpt
It's something they can do that feels good that isn't assaulting people. A lot of mundane pleasures get ruined by becoming a VtM Vampire. They can't go for a stroll in the daylight, most opportunities for socializing with normal people are messed up by their hours and their struggle with their impulses, and they can't eat normal food anymore. Smoking, meanwhile, is something they can not only still do, but do as much as they want with no fear of the consequences; a vamp would have to wrap their lips around a coal plant exhaust to inhale enough smoke to hurt them. 

If they never smoked before, the sudden lack of consequences makes it more appealing. If they did smoke before, then continuing to do so is one of the few things from their mundane life that can continue uninterrupted.