When HAPPINESS is One's Ultimate Criteria

Reuters has an article about a a girl who considers herself a "human pet". She is led by her fiance on a leash and says she generally acts animal-like..."

What's interesting is the the basis for justification she provides for her behavior and actions, saying: "It might seem strange but it makes us both happy. It's my culture and my choice. It isn't hurting anyone."

Perfect example of what all can and is considered acceptable when not only the Scripture (and our ultimate calling) is set aside but when one looks to happiness and whether one's actions hurt someone else as the ultimate criteria for evaluating one's actions. And yet how often do we hear it argued that "It's my choice and if it makes me happy and if I'm not hurting anyone", then it must be okay?