Should couples live together before they are married?

In today's culture, more and more people are living together before they are married. Most give the reason that they are testing the waters, trying to see if they can really spend the rest of their lives with this one person. The problem with this outlook is that no can truly know if they are going to have a successful marriage because the only way to know is if you are married and they are not married. Living together is about building compatibility not testing your compatibility. When they start having problems, someone leaves, they have failed the test. When married couples have problems they work through them because they know that they are bound together by a special bond that they both value. Unmarried couple are playing house. This all stems from the "hook up culture" of the college life. It is easier to have sex or move in together than to get married and make a commitment.