Early psychosocial stress affects men's relationship length

Life history theory predicts that the optimal reproductive strategy for individuals in risky and uncertain environments (subjectively experienced as early psychosocial stress) is to maximize current reproduction to minimize the chances of lineage extinction. Having many short-term relationships and many lifetime sex partners are ways to maximize current reproduction, but they come at a cost (e.g., decreased resources for future reproduction, decreased desirability as a future mate, etc.). This study, therefore, examined whether sexually active individuals with high levels of early psychosocial stress report more terminated short-term relationships, a shorter relationship length with their current partner, and more lifetime sex partners than those with less early psychosocial stress. Early psychosocial stress in men was associated with more terminated short-term relationships and a greater number of lifetime sex partners, but not with current relationship length; in women, high early psychosocial stress was associated with shorter current relationship length but not with the number of terminated short-term relationships or number of lifetime sex partners. Results are discussed from the perspective of life history theory and gender differences in preferences for short- and long-term relationships.