Thanks for your kind words and the compelling arguments against my hypothesis. Also, very good read which I agree with partially. The article addresses women's desire for novelty which I also confirm present, but it doesn't cover the underlying psychological reasons for it nor presents the background or the consequences of such need for the couple. Again, I don't have anything against people that don't want to stay in a monogamous relationship, my observation is rather regarding how you can maintain intimacy in a couple when you decide you'll open your relationship to other people. But then again, I just might be old-school for imagining the couple as this perfectly imperfect mechanism that has the power to self-regulate over time through intimacy addressing each partners' needs without creating resentment.