Men seek to make themselves happy. Whatever it takes to make one happy, pleasured, entertained, etc. man will work toward what he wants. It is human nature. Happiness is being pleased with where you are, what you have, what you've done, anything. If you've ever been depressed you will understand what it means to want to be happy again. To need it, to seek it. I cannot describe the pain of your greatest happiness being torn from you, and wanting it back. Everyone needs some sort of joy, no-one wants to be un-happy in life.
Happiness can be described as that feeling of satisfaction and contentment. The reason most people look for happiness is because it is a healthy and relaxed state. A life of happiness does not worry and is therefore desired by many.
For myself, happiness has to come from within. If I know that I have been fair , honest . and considerate toward those that I interact with,then that helps me to be happy with myself. Of course there are those external things that give short-term good feelings and fun as well . I think those people that are always seeking some new thing to be happy about, just haven't looked deep inside themselves to find the root cause of their unhappiness.Can't be happy outside unless you are happy inside !