I noticed on numerous occasions that my cousin and also my other cousins husband both smoke after eating. When I asked one of them why they smoked right away after eating, he said “it is the best cigarette of them all when I smoke after eating”. He also said that cigarette after eating tastes the best or hits the best. I am sure there is a scientific explanation for this smoking right after eating or even smoking after sex but I think what is going on here is that food gives people pleasure in general (especially after you eat while you are hungry). I suspect the pleasure people feel from being full reminds them or triggers them of the Nicotine pleasure. I am no biologist or scientist but that is my take on this matter.