During individual development, gents and ladies faced distinct adaptive problems, including pregnancy, searching, childcare, and warfare. As a result of these sex-linked adaptive issues, normal selection could have favored psychological mechanisms that oriented both women and men toward developing friendships with people possessing traits valuable for re solving these issues. The present research explored sex-differentiated friend choices and also the mental design options that come with exact exact same- and opposite-sex friendship in 2 tasks. These friends serve in their lives in Task 1, participants (N = 121) categorized their same-sex friends (SSFs) and opposite-sex friends (OSFs) according to the functions. In Task 2, individuals created their ideal SSFs and OSFs making use of limited spending plans that forced them to create trade-offs between your faculties they really want within their buddies. In Task 1, men, significantly more than females, reported SSFs that is maintaining for pertaining to athleticism and status enhancement and OSFs for mating possibilities. In Task 2, both sexes prioritized agreeableness and reliability inside their ideal SSFs, but guys prioritized physical attractiveness within their OSFs, whereas ladies prioritized financial resources and prowess that is physical. These findings claim that buddy choices might have developed to fix ancestrally sex-linked adaptive dilemmas, and that opposite-sex relationship may straight or indirectly provide mating functions.