puits (1) ressources (1) évolution (1) ethnologie (1) coût (1) méthode (1) Money (1) Reproduction (1) Costs (1) Selection (1) Nephews (1) Sexual orientation (1) Nieces (1) Thought and thinking (1) Success (1) Societies (1) Science (1) Reproduction (1) Orientation (1) Money (1) Men (1) Manufacturers' agents (1) Males (1) Maintenance (1) Java (Indonesia) (1) Hypothesis (1) Male homosexuality (1) Fertility (1) Expression (1) Evolution (1)