Extradyadic involvement during dating

College student men (n = 299) and women (n = 392) reported their experience s with extradyadic (ED) dating and sexual activity. We also investigated th e relationships between ED activity and religiosity, sex-love-marriage asso ciation beliefs, narcissism, sexual sensation seeking, a 'ludic' or game-pl aying orientation to romantic relationships, and self-perceived ability to deceive one's dating partner. Despite normative disapproval for ED activity , a majority of respondents reported having had ED involvement while dating . There was no sex difference in the incidence of ED dating or ED kissing; however, men were more likely than women to experience ED fondling, oral se x, or vaginal intercourse. In general, ED dating and ED sexual activity wer e related to less adherence to sex-love-marriage association beliefs, incre ased sexual sensation seeking, a 'ludic' love style, and a self-perceived a bility to deceive one's dating partner. Findings are discussed with regard to possible implications and directions for future research.