title: Daily diary study of adult men's and women's event-level sexual motivations and sexual behaviour.
abstract: Background Understanding people's sexual motivations has long been of public health and health promotion interest. We used daily diaries to examine how adult men's and women's event-specific affective sexual motivations were linked to the types and combinations of sexual behaviours chosen in a given sexual event.
  
  
  
  Adult men (n=156) and women (n=192) completed thrice-daily electronic diaries assessing individual- and partner-specific attributes and non-coital or coital sexual behaviours. Sexual motivations were: interest in sex, feeling in love with partner, wanted to have sex and partner wanted to have sex. The outcome variable was: sexual behaviour type (no sex, one vaginal sex event, one vaginal sex event+any other sex types, multiple vaginal sex events, any other sex types). Mixed-effect multinomial logistic regression modelled the influence of each sexual motivation on sexual behaviour type (Stata; all p<0.05). 'No sex' was the referent in all models; all models controlled for gender.
  
  
  
  Participants contributed 14856 total partner-associated diary entries. Most (54%; women: 56.5%, men: 51.2%) were associated with no sex; when sex occurred, the most common behaviour type was one vaginal sex event (13.1%) for women and other sex types (16.4%) for men. Wanting to have sex or perceiving a partner wanted to have sex were the strongest predictors of sexual behaviour type, and were associated with a greater number of reported sexual behaviours.
  
  
  
  Event-specific sexual motivations are associated with the choice to have sex, and with variation in the chosen sexual behaviours.
authors.affiliation: Department of Pediatrics, Section of Adolescent Medicine, Indiana University School of Medicine, 410 West 10th Street, Room 1001, Indianapolis, IN 46202, USA.
authors.forename: Devon J
authors.initials: DJ
authors.lastname: Hensel
authors.affiliation: Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA.
authors.forename: Fei
authors.initials: F
authors.lastname: He
authors.affiliation: Department of Biostatistics, Indiana University, Bloomington, IN, USA.
authors.forename: Jarek
authors.initials: J
authors.lastname: Harezlak
authors.affiliation: Department of Pediatrics, Section of Adolescent Medicine, Indiana University School of Medicine, 410 West 10th Street, Room 1001, Indianapolis, IN 46202, USA.
authors.forename: J Dennis
authors.initials: JD
authors.lastname: Fortenberry
mesh_terms: D000293:Adolescent; D000328:Adult; D002755:Choice Behavior; D000078646:Diaries as Topic; D005260:Female; D006801:Humans; D007196:Indiana; D008297:Male; D009042:Motivation; D011446:Prospective Studies; D012725:Sexual Behavior / Q000523:psychology*