Male androphilia (i.e., male sexual attraction to males) is an evolutionary paradox. It is unclear how genes for male androphilia persist given that androphilic males have lowered reproduction? Evidence suggests that ancestral androphilic males were transgendered. Hence, I address this paradox by focusing on a group of Samoan transgendered androphilic males (i.e., fa’afafine). Specifically, I show that male androphilia has consistent developmental correlates across Samoan and Western populations, indicating that fa’afafine provide a suitable model for the evolution of male androphilia across populations. In addition, I test hypotheses concerning the evolution of male androphilia. Fa’afafine’s mothers and grandmothers exhibit elevated reproduction. Also, compared to Samoan men and women, fa’afafine exhibit unique kin-investment cognition that would enhance indirect fitness. Elevated reproduction by female kin, and enhanced kin investments may, therefore, contribute to the evolution of male androphilia. Lastly, I outline a developmental model for this unique kin-investment cognition in androphilic males. / xvii, 201 leaves : ill. ; 29 cm

The Kin Selection Hypothesis proposes that the genes associated with male androphilia (i.e., sexual attraction/arousal to adult males) may be maintained over evolutionary time if the fitness costs of not reproducing directly are offset by increasing one’s indirect fitness. Theoretically, this could be accomplished by allocating altruism toward kin which would increase the recipient’s ability to survive and reproduce. Evidence for this hypothesis has been garnered through research conducted in Samoa however, no support has been garnered from research conducted in more industrialized cultures (i.e., USA, UK, Japan). In this thesis, I use a Canadian population to examine: (1) the role geographic proximity plays in the expression of androphilic male avuncularity and (2) whether androphilic males direct altruism toward the children of friends who might represent proxies for nieces and nephews in more industrialized cultures. Other sociocultural factors that potentially influence the expression of androphilic male avuncularity are also discussed. / ix, 81 leaves ; 29 cm