Cohabitation is a tentative, non-legal coresidential union. It does not require or imply a lifetime commitment to stay together. Even if one partner expects the relationship to be permanent, the other partner often does not. Cohabiting unions break up at a much higher rate than marriages. Cohabitors have no responsibility for financial support of their partner and most do not pool financial resources. Cohabitors are more likely than married couples to both value separate leisure activities and to keep their social lives independent. Although most cohabitors expect their relationship to be sexually exclusive, in fact they are much less likely than husbands and wives to be monogamous.