An overview: the sociocultural perspective and sex research, by J. N. Edwards.--Sexual codes in teen-age culture, by I. L. Reiss.--Scandinavian and American sex norms: some comparisons, with sociological implications, by H. T. Christensen.--Changing sex norms in America and Scandinavia, by H. T. Christensen and Christina F. Gregg.--Homosexuality in various communities, by D. J. West.--The homosexual community, by M. Leznoff and W. A. Westley.--The lesbians; a preliminary overview, by W. Simon and J. H. Gagnon.--Prostitution in the United States, by T. C. Esselstyn.--Apprenticeships in prostitution, by J. H. Byran.--Postmarital coitus among widows and divorcees, by P. Gebhard.--The definition and prohibition of incest, by L. A. White.--Incest behavior, by S. K. Weinberg.--Some factors related to the sexual satisfaction of the college educated wife, by R. R. Bell.--Marital sexuality in four cultures of poverty, by L. Rainwater.--Postmarital consequences of premarital sex adjustments, by E. J. Kanin and D. H. Howard.--A cross-cultural comparison of attitudes toward marital infidelity, by H. T. Christensen.--Extramarital sex: alienation or extension of normal behavior, by R. N. Whitehurst.