In this study, the authors examined the contribution of attachment orientations to the content of daily sexual fantasies. The two partners of 48 couples independently reported on their attachment orientations and provided daily reports on relationship interactions and sexual fantasies for a period of 21 days. Results showed that attachment anxiety was associated with wishes for intimacy and representations of others as more affectionate in sexual fantasies. Conversely, avoidant attachment was associated with avoidance-related wishes and representations of the self and others as more aggressive and alienated. Negative couple interactions increased habitual attachment-related wishes and self-representations. Specifically, during days characterized by negative couple interactions (relationship-damaging behaviors), attachment anxiety was associated with portrayal of the self as more helpless and avoidant attachment was associated with the expression of more avoidant wishes and portrayal of the self as less helpless. The discussion focuses on the manifestations of attachment-related interpersonal goals in sexual fantasies.