| Summary: | Highlights When tested outside of their social groups, male and female rhesus macaques show no sex differences in their toy preferences. Males and females were both more likely to interact with neutral toys and “masculine” toys than with “feminine” toys and sex-ambiguous toys. When they interacted with toys, males interacted more with neutral toys than with “masculine” toys. When they interacted with the toys, females interacted more with neutral toys than with “masculine”, “feminine” or ambiguous toys. Only one between-sex difference emerged: when they interacted with it, males interacted more with the doll more than females did.
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