The concept of renewable marriages (you renew your vows every couple of years or leave) or temporary marriages isn’t new. But perhaps it isn’t widespread either. Here’s an opinion on such marriages. The opinion talks about famous people who liked the idea, or who lived the idea; it also speaks of laws on temporary marriages that were proposed but not formed. Of course when factors like children are involved, such an idea does not hold. The writer argues that longevity of a marriage alone should not be an indicator of a healthy and happy marriage.