Intimacy and passion are two key components of a high-quality relationship. But to what extent are intimacy and passion intertwined? In a recent study, couples reported on their feelings of intimacy (e.g., how much they self-disclosed and felt close to one another) and passion in their relationships each day for three weeks. They also noted whether they had sex each day and if that sex was satisfying. Increases in intimacy over time were associated with higher passion, as well as more frequent and better sex.
Rubin, H., & Campbell, L. (2012). Day-to-day changes in intimacy predict heightened relationship passion, sexual occurrence, and sexual satisfaction: A dyadic diary analysis. Social Psychological and Personality Science, 3, 224-231.