Little, Brown, 1995. Edward O. Laumann, John H. Gagnon, Robert T. Michael, and Stuart Michaels. The Social organization of sexuality in the United States. University of Chicago Press, 1994. Generally, extramarital sex is considered wrong, but blacks tend to favor it more than white Catholics, and white Catholics more than white Protestants.
Women are more likely than men to disapprove of extramarital sex, more so among blacks.
The same relationship exists among blacks regarding homosexual relations, but among whites no sex and religious differences exist. The vast majority of Americans oppose extramarital sex. The largest causal impact on extramarital sexual permissiveness comes from attitudes on premarital sexual permissiveness which are linked to class and general attitudinal liberalism. While there has been an increase in permissiveness towards premarital sex, attitudes towards extramarital and homosexual behavior have changed little. Jews, persons with no religion, young adults, and people with greater education have more permissive sexual attitudes.