Theoretical considerations: Ellis, A. Healthy and disturbed reasons for having extramarital relations. Walshok, M. L. The emergence of middle-class deviant subcultures, the case of swingers.--New sexual attitudes: Stanton, E. Swinging as a way of life. Whitehurst, R. N. Alternative life-styles. Ramey, J. W. Intimate groups and networks, frequent consequence of sexually open marriage.--Clinical studies: Strean, H. S. The extramarital affair. Henshel, A.-M. Swinging, a study of decision making in marriage. Edwards, M. and Stinnett, N. Perceptions of college students concerning alternate life styles.--Implications for therapy: Peck, B. B. Therapeutic handling of marital infidelity. Neubeck, G. and Schletzer, V. M. A study of extramarital relationships. Whitehurst, R. N. Violence potential in extramarital sexual responses.