From 2007... Among the married, a higher discrepancy between men's and women's number of previous intercourse partners was related to lower levels of love, satisfaction, and commitment in the relationship

From 2007... Matching in Sexual Experience for Married, Cohabitating, and Dating Couples. Luis T. Garcia & Charlotte Markey. The Journal of Sex Research, Volume 44, 2007 - Issue 3, Pages 250-255. Dec 5 2007. https://doi.org/10.1080/00224490701443817

Abstract: This study examined heterosexual romantic partners' number of intercourse partners prior to the initiation of their relationship to determine if a significant positive correlation (matching) occurred between partners, and if this matching was associated with their level of love and satisfaction with and commitment to the relationship. One hundred and six couples who were dating, cohabitating, or married participated in this study. Results indicated that, with the exception of cohabitating couples, romantic partners showed a significant level of matching in the prior number of intercourse partners. Further, among the married couples, a higher discrepancy between men's and women's number of previous intercourse partners was related to lower levels of love, satisfaction, and commitment in the relationship.