Abstract
Besides frequent sanctions and potentially serious consequences, extra-pair sexual activities are a relatively common phenomenon. Most previous studies focused on gender differences related to extra-pair sex.
However, we can also see high variability even within individual genders. Here we focus on the link between previous experience with extra-pair sex in previous romantic relationships and in primary family and own reported extra-pair sex tendencies and behavior.
Each partner of the 86 long-term cohabiting couples filled in the Questionnaire of Dyadic Assesment, Extramarital Behavioural Intensions Scale and Infidelity Experience Questionnaire. Similarly as in previous studies, in women who reported extra-pair sex we found a lower level of overall Dyadic Adjustment.
This difference was mostly due to a difference in subscale Affectional Expression. We found no similar differences in case of men.