Just recently I went into the home of an acquaintance and they seemed to look a little guilty. It seemed kind of odd until I smelled the tell-tale odor of cigarettes. I didn't realise this person smoked, and given by profession they preferred for me not to know. I have no judgement on this person or any other smoker, I'm just there when they need to quit. This person is not alone in the category of secret smoker. I have had many clients over the years, who smoked only in private, but felt guilty because in many instances they were very healthy otherwise.