Before their current relationship, individuals may have had a variety of previous relationships such as romantic relationships, sexual relationships, and cohabiting relationships. In this study we explored the common or shared influence of these 3 types of previous relationships, and the unique influence of each type, on current relationship functioning. With a sample of more than 4,000 individuals we found that there was a significantly negative shared influence for previous romantic, sexual, and cohabiting relationships on current relationship attitudes, sexual satisfaction, commitment, and stability. Above and beyond the shared influence, there was also a unique negative influence for previous sexual and cohabiting relationships on current relationship stability. The effects were largely similar for women and for men. It appears that on average the positive lessons that are learned from previous relationship experiences are likely being overwhelmed by the negative carryover, especially in regard to relationship attitudes and relationship stability.