Sex and marriage are gradually going their separate ways, with the result that extramarital sex is no longer taboo. From this perspective, marriage as a means to perpetuate the family line is no longer so clearly distinct from the superficially individualistic practice of cohabitation.
性與婚姻的逐步剝離，讓婚姻外的性關係不再是禁忌，從這個角度看未來，以家族傳承為目的的婚姻，和個人主義表徵的同居之間的差異，已不再是一白一黑，截然分明。