Ученые-психологи иногда делают очень прямолинейные выводы в стиле поручика Ржевского. Так вот чем больше у девушки знакомых красивых мужчин, тем чаще.
The results indicate that men whose in-pair partner has more male coworkers and friends (i.e., potential sexual rivals) also perform more frequent in-pair copulations, but only among men who perceive their partner to be particularly attractive relative to assessments of partners by other men in the sample.
Partner attractiveness moderates the relationship between number of sexual rivals and in-pair copulation frequency in humans (Homo sapiens).