I just saw someone else post asking why someone would want to get married, so I'm curious to see the opposite. Within the U.S., you can pretty much marry whoever you want as long as they are of age, and many legal benefits come with that. I personally know a couple who have been together for 20 years, and we live in a state that doesn’t recognize common-law marriage, so they are now considering it. Are there other situations where it simply makes sense to not get married?