Extradyadic activity in a random sample of Norwegian couples

The purpose of this study was to explore extradyadic sexual activity (ESA) in Norwegian heterosexual couples and to identify factors connected to each of the parties that may predict ESA. The study comprised a representative sample of 399 couples (798 individuals) between 22 to 67 years of age. The data were collected by means of self-administered postal questionnaires. In 6% of couples the female partner had had a concurrent sex partner, in 13% of couples the male partner had had a parallel sex partner and in 4% of couples both had engaged in ESA. A man with experience of ESA experienced negative work-to-home interference, was preoccupied with sex, and frequently thought of others during sex with his wife. The male partner of a woman with experience of ESA was reported being self-confident and she perceived him as easy to talk to about sex. Furthermore, his attitude was that two persons who love each other should not have secrets from each other. The woman with experience of ESA, on the other hand, reported having secrets from her partner and to think of others during intercourse.