Why Does A Person Smokes After Having His/Her Meal?

First, I would to inform to all my friends who are reading this post that this post has nothing to do with anyone specificly. It is a question which has made me think of it for a long time.

Dear friends,

If you are a smoker [I am not saying U all are bad :-) ], I would like to know why does situation happens? What kind of feelings you all get by having a smoke after meal. I been looking around my friends and also people around me no matter where is it, this situation happens.I would like your humble opinion so that others will know the real explanation....

Thank you.

p/s : Please do answer my poll beside by blog. I would like to know your answers about the questions there.....