New research: Friends with benefits relationships (FWB).

Despite the fact that FWB relationships have become very common, there's still little research examining the nature and impact (both positive and negative) of these types of relationships. This recent study was just published online in the Archives of Sexual Behavior:

Friendship After a Friends with Benefits Relationship: Deception, Psychological Functioning, and Social Connectedness Abstract

Friends with benefits (FWB) relationships are formed by an integration of friendship and sexual intimacy, typically without the explicit commitments characteristic of an exclusive romantic relationship. The majority of these relationships do not transition into committed romantic relationships, raising questions about what happens to the relationship after the FWB ends. In a sample of 119 men and 189 women university students, with a median age of 19 years and the majority identified as Caucasian (63.6 %), we assessed relationship adjustment, feelings of deception, perception of the FWB relationship and friendship, social connectedness, psychological distress, and loneliness. Results demonstrated that the majority of FWB relationships continued as friendships after the sexual intimacy ceased and that about 50 % of the participants reported feeling as close or closer to their FWB partner. Those who did not remain friends were more likely to report that their FWB relationship was more sex- than friendship-based; they also reported higher levels of feeling deceived by their FWB partner and higher levels of loneliness and psychological distress, but lower levels of mutual social connectedness. Higher levels of feeling deceived were related to feeling less close to the post-FWB friend; also, more sex-based FWB relationships were likely to result in post-FWB friendships that were either more or less close (as opposed to unchanged). FWB relationships, especially those that include more attention to friendship based intimacy, do not appear to negatively impact the quality of the friendship after the “with benefits” ends.

The reference, for those who would like to read the full article (search through UBC Library, PsycInfo):

Owen, J., Fincham, F. D., & Manthos, M. (2013). Friendship after a friends with benefits relationship: Deception, psychological functioning, and social connectedness. Archives of Sexual Behaviour, DOI: 10.1007/s10508-013-0160-7 (published online first).