In this qualitative research, I first use hegemony theory to describe the cultural forces that position monogamy as the only privileged form of committed sexual relationship coupling available to undergraduate heterosexual men. I then interview 40 heterosexual male students for their experience with monogamy and cheating, finding that the hegemonic mechanisms of subordination and stratification that stigmatize nonmonogamy consequently result in an absence of consideration of the problems associated with monogamy. I use cognitive dissonance theory to explain participants’ desires for simultaneously wanting monogamy and nonmonogamy, calling this dissonance ‘the monogamy gap.’ Data suggest that participants who cheat do so not because of lost love, but instead cheating represents an attempt to rectify conflicting desires for monogamy and recreational sex.