Because even if you lose you still find way to gamble after all. And when you win a little you totally happy and then you are inspired to do gambling again to try another luck on it.
In short, it is our emotion that is the driving factor that we are going back and want to gamble again and again. For me, that emotion is focus on having fun and entertainment while I think others are really for the gain - at the end of the day when both of us experienced a losing session, I will be ok but I am not sure with the other whose aim is for profit
