Theories of mate selection.
D005075:Biological Evolution; D003241:Consanguinity; D003469:Culture; D004777:Environment; D005006:Ethnicity; D005260:Female; D005298:Fertility; D005828:Genetics, Population; D006801:Humans; D008297:Male; D008393:Marriage; D011574:Psychoanalytic Theory; D011582:Psychological Theory; D044469:Racial Groups; D012641:Selection, Genetic; D012923:Social Class; D012945:Social Values; D014473:Unconscious, Psychology