Monetary exchanges with nieces and nephews: a comparison of Samoan men,women, and fa'afafine

Androphilia refers to sexual attraction and arousal to adult males, whereas gynephilia refers to sexual attraction and arousal to adult females. The kin selection hypothesis for male androphilia suggests that androphilic males have been selected to act as “helpers-in-the-nest,” caring for nieces and nephews and, by extension, increasing their indirect fitness. Previous research has demonstrated that Samoan male androphiles (known locally as fa'afafine) exhibit significantly higher altruistic tendencies toward nieces and nephews compared to Samoan women and gynephilic men. Elevated avuncular tendencies must translate into real-world avuncular behavior if they are to have any impact on the fitness of nieces and nephews and the uncles themselves. The present study examined whether Samoan fa'afafine exhibit higher altruistic behavior toward nieces and nephews compared to women and gynephilic men. We used money given to, and received from, oldest and youngest siblings' sons and daughters as a behavioral assay of kin altruism. Compared to women and gynephilic men, fa'afafine gave significantly more money to their youngest siblings' daughters. No group differences were observed for money received from nieces and/or nephews. There were no correlations between number of children parented and monetary exchanges with the niece and nephew categories examined, suggesting that childlessness cannot account for why fa'afafine give more money to their youngest siblings' daughters. These findings are consistent with the kin selection hypothesis for male androphilia.