Well I think it is a great idea. The couples can decide whether they want to continue as married couples or go on to pursue something else. People change all the time and maybe this will accomodate the changing human nature and their needs. Men and women change differently or to better put it, mature differently. Their outlook in lives changes and so do their interests. If this is the case, in my opnion, there will be less infidelity with men straying away from their marriages and looking for intimacy outside of marriage. In USA, they have the terminology called the seven year itch. In the present setting, men do tend to cheat on their wives a lot. You can check out the website www.AshelyMadison.com, a website which allows a forum for both men and women to seek discreet extra marital affairs. Sometimes the wives find out and other times they don't of their husband's extramarital affairs. Unfortunately in majority of cases, it ends up with the women sacrificing their lives inspite of knowing of their husbands philandering ways and but deciding to stay in the marriage inorder to hold the family together for the sake of their children. Men should be equally responsible for holding the family together and contributing to the mental, emotional and physical wellbeing of the children they bring to this world. This may be a very progressive approach but I think this will allow both men and women to reassess their needs and their marriage going forward. And speaking for myself as a woman, I would prefer to be with somebody because I want to be with him rather than to stay with him because of fear of the legal proceedings and the societal objections. I think marriage expiring after seven years is more practical for this day and age.