The Ultimate Betrayal? Infidelity and Solidarity in Close Relationships

Abstract

(From the chapter) In this chapter, we describe how the attitudes and norms regarding extradyadic sex and the jealousy resulting from the infidelity of one's partner reflect that this behavior is perceived as a serious breach of trust and as an undermining of the relationship, and we suggest that this may in part be explained from an evolutionary perspective. We examine from a social exchange perspective the relational dynamics associated with the negative emotional responses (in particular jealousy) to the fact that one's partner engages in extradyadic sex, and we argue that, to a considerable extent, these responses reflect that adultery by one's partner is experienced as a complete lack of solidarity. We also argue, however, that under some circumstances it is not the behavior as such, but rather the violation of agreed upon norms that leads to a negative emotional response. Finally, we analyze some of the factors that may induce people to refrain from or to engage in extradyadic sex. We link these analyses to the model of solidarity and prosocial behavior outlined by Lindenberg (this volume). (PsycINFO Database Record (c) 2007 APA, all rights reserved)