Hello and welcome back everybody. I am really sorry for having been away for so long. However, as you know, there are always some ups and some downs in life, and sometimes, you indeed need to keep your family as your priority. Well, since we meet ( rather greet ) each other after a long time, the first thing we would have done in case we had met in real life is - to smile. And we do smile, which is regarded synonymous to expressing our happiness. But, is it always that people smile when they are happy. Well, often a lot of people complain in forums that they have regarded the smile of a girl / man as a "hint" expressing "interest", and have latter regretted for this misconception. So, for all our student friends across the globe, it is really very important to understand - this mystique element of human behavior - "smile". History has it that when Leonardo created the work of Monalisa, which is one of the most costliest paintings ever, the object o