I find it implausible when characters who do not smoke in canon smoke in fanfic.

I find it implausible when friends who do not usually smoke around my light up. It's happened many times and it always gives me this horrible sense of dissonance. If I could backbutton out of the moment and never have known about it I would.

Also, my mom smoked my whole life until she decided she wanted to see my graduate from grad school (not undergrad, mind, grad school), so to me, smoking is the antithesis is sexy. That's just a bad image.