Photo by @connorjkeith  on Twenty20.com Happiness does not have a specific definition. You can hear many men, for instance, saying as a joke that happiness is living like the late Hugh Hefner, the owner of Playboy Magazine, with a big hareem of girls in a beautiful mansion and having an endless party. On the other hand, many girls say that happiness is being in a shopping mall and having a limitless credit card. Those examples are, of course, just funny stereotypes,…