Does smoking Helps in Digestion?

Obviously , those smokers fell better when they smoke, whether before ,during and after meal. Some says , it helps them in digestion but to researched no one has testified yet for a scientific reason for that. It maybe just a psychological effect to an individual who used to smoke that he feels better or satisfied after smoking.
In medicine, that deals with lung disease , is that smoking can cause lung cancer. The lung is like a candle and the cigarette is the flame.