Highlights•2–4% of spouses report having sex with a secondary partner in the preceding 12
months.•Males and females are now engaging in infidelity at similar rates.•Infidelity shows …

Extramarital involvement (EMI) occurs with high prevalence among couples in clinical and
community settings, frequently resulting in considerable distress both to participants and …

Infidelity is a common phenomenon in marriages but is poorly understood. The current study
examined variables related to extramarital sex using data from the 1991-1996 General …

The aim of this article was to describe partnered and non-partnered sexual activity and
sexual satisfaction in older men and women from Norway, Denmark, Belgium, and Portugal …

This study examined the gender-specific correlates of face-to-face and online extradyadic
involvement (EDI) in dating relationships. The sample consisted of 561 women (M age …

Paternal discrepancy (PD) occurs when a child is identified as being biologically fathered by
someone other than the man who believes he is the father. This paper examines published …

The assumption that early sexual debut leads to adverse outcomes has been used as
justification for sexual health interventions and policies aimed at delaying sexual initiation …

The purpose of this study was to describe and analyze use of pornographic material in a
representative sample of adult Norwegians. The data collection was carried out by means of …

This article introduces a metatheoretical framework—the Relationship Trajectories
Framework—that conceptualizes how human mating relationships develop across their …

An important defining characteristic of a monogamous relationship is that certain behaviors
are regarded as acceptable only for the two individuals involved in the relationship. When …