smoke a cigarette that's 9 miles long An unidentified man smokes a cigarette as he walks Mevius - Wikipedia
Description
Cravings can be triggered by emotional states, such as stress or boredom, as well as external cues, like the sight or smell of certain foods

Over-the-counter products like patches and gum are generally not recommended until you're no longer using nicotine products
For any studies written by one or more co-authors of the present review, an independent author, who had not participate in those studies, reviewed them for suitability of inclusion

This is where the Food and Drug Administration can assist
Read part one here and part two here