Extramarital Involvements (EMIs) attract significant societal attention, as exemplified by the revelation of former President Clinton's EMI. Depression, anxiety, and divorce are important sequelae of EMIs, though it will be important to learn which couples successfully cope with EMIs. Allen et al. (this issue) provide an excellent overview of the prevalence of EMIs and the problems in trying to ascertain accurate estimates thereof. The impact of a very close relationship even without explicit sexual contact was noted, and Allen et al. present a useful framework for organizing theoretical positions and data on EMIs. It is an excellent review for a clinician or researcher addressing EMIs.