“…Scores on the MRI predict a number of relationship outcomes, behaviors, and attitudes in American newlywed couples (e.g., Buss & Shackelford, ) and American undergraduate dating couples (e.g., Buss, ), in Spanish and Croatian samples (e.g., de Miguel & Buss, , and Kardum, Hudek‐Knežević, & Gračanin, , respectively), and in consensually nonmonogamous romantic relationships (Mogilski, Memering, Welling, & Shackelford, 2015). Men's mate retention behaviors vary in evolutionarily predicted ways with men's perceptions of the risk of their partner's infidelity (Starratt, Shackelford, Goetz, & McKibbin, ), the phase of their partner's ovulatory cycle (e.g., Gangestad, Thornhill, & Garver, ), their partner's use of hormonal contraceptives (Welling, Puts, Roberts, Little, & Burriss, ), and men's self‐esteem (Holden et al, ). Mate retention also vary as a function of both men's and women's self‐evaluations and partner evaluations of mate value (Miner et al, ; Starratt & Shackelford, ), partner‐directed oral sex behavior (Pham & Shackelford, ; Sela, Shackelford, Pham, & Euler, ), sociosexuality (Kardum et al, ), and personality traits (e.g., Holden, Zeigler‐Hill, Pham, & Shackelford, 2014; Pham, Shackelford, Holden, Zeigler‐Hill, Sela, & Jeffrey, ).…”