Should Unmarried Couples Live Together? Should or should not unmarried couples live together? This is a question asked of many people. Some people will say yes and others will say no. Personally, I say no to unmarried couples living together. Two unmarried people of the opposite-sex living together is known as cohabitation. Cohabitation is also known by other terms, such as “living together”, “shaking up”, or “living in sin.” In the sixties and seventies cohabiting couples were know as simply “anti-marriage”. During the sixties and seventies these couples saw traditional marriage as repressive and irrelevant so they were looking for an alternative