I saw a news broadcast about a household of people all 'in love' with each other. It was 3 couples, if I'm not mistaken, all living in the same house having the same kinds of relationships with each other. They did exactly what you have stated here, which is switch off sex-capaids between them all and have group discussions about disputes and so on and so forth. There were 3 men and 3 women and because of all them having sex with each other there were multiple kids from various match ups. Now were they happy? Any time you have a group or community where your thoughts and feelings matter you're going to be happy enough. Were they all in love with each other? Depends on your definition of love. With my own personal definition of love... when I first saw the broadcast I did not believe they were in love because of how, more than a few of them, had acted towards various others. They had done the interview with the original couples who came in together and I remember seeing one couple of a man and woman just very cold to each other. From seeing that as well as hearing that they had been having troubles and the woman just goes off with some other woman and the man goes off by himself, I do not believe that is love. To me that was more of 'you're not the only one here and I'm happier for it' which would be the case between any number of people who decide to do this as opposed to just two people working together as a unit. When one gets hurt feelings from another they have the third to run to. When the third gets the same hurt feelings they can pretty well just vote that other out. So is it long lasting? Depends... I believe the broadcast I saw with this particular house of 6 people will last for a very long time, and truly it has already.