For section "sex": "Here should be a summary of the sex-determination system article and related material, with emphasis on how the categorisation into male and female works, i.e., stuff about sexual dimorphism (how sex is determined in different species). XX chromosomes, SRY genes, reproductive tasks, etc."
For section "social category": This needs to be expanded.
For section "music": Write about Riepel's theories
For section "other languages: Should this section be here at all? See AlexR's comments on the talk page (now in Talk Archive 1).
