World war craft, farmville and messero all use social hooks to keep you coming back for more. You may not play any of these games or messero in these aps, but there is probably something similar in your life. It could be a degree that you want to change, or a career you want to escape,. Or a relationship you know is o and you don't stick with it over and over again. So here is a fall experiment. Imagine you've dropped yourself on over the edge of a crew ship. Now you would need james cameron's unmanned submarine fleet to find that selphone again. And you could spend a small fortune to retrieve it, or not