Disavowing the naturalistic fallacy ... Why “sex” may not mean what you think it means ... Did evolution make women “choosier” about sex partners than men? ... Haggling over the price of sperm and eggs ... Agustín: Empirical studies complicate evolutionary psychology’s theoretical models ... The evolutionary significance of non-reproductive sex ... Why are males bigger than females in our species? ... Looking at pornography (for insights into human evolution) ... Are male and female sexual jealousy systematically different? ...