What Fantasies Can Do to Your Relationship: The Effects of Sexual Fantasies on Couple Interactions.
Level 2 - randomized trial
Multiple randomized experimental studies (Studies 1 and 2) combined with prospective daily diary cohorts.
PubMed 30122104 · doi:10.1177/0146167218789611
What was done
Four studies evaluated how fantasizing about one's romantic partner ("dyadic fantasies") affects relationship outcomes. Studies 1 and 2 were experiments where participants were directed to fantasize about either their partner or another person and subsequently rated their desire for sex and nonsexual relationship-promoting activities. Studies 3 and 4 were prospective daily diary studies where couples logged fantasies and interactions nightly over 21 and 42 days, respectively, with Study 4 also assessing daily relationship perceptions.
What was found
The abstract reports no numerical values, effect sizes, or test statistics. Qualitatively, dyadic fantasizing was associated with increased sexual desire and greater engagement in relationship-promoting behaviors. Furthermore, relationship perceptions mediated the relationship between dyadic fantasies and relationship-promoting behaviors.
Why it matters
This study shows that sexual fantasy content influences interpersonal dynamics, suggesting that partner-focused fantasies actively support relationship maintenance by enhancing partner appeal.
Limits
The abstract provides no sample sizes, demographic characteristics, or quantitative metrics. Outcomes rely entirely on subjective self-report logs, which are susceptible to social desirability and reporting bias.