‘This word which originally denoted either of the two categories, male and female, is from Old French sexe or Latin sexus. Sex denoting sexual intercourse dates from the 1920s; the adjective in this phrase (mid 17th century sexual) is from the late Latin sexualis, from late Latin sexus.’
– Chantrell. G. edt. 2002. The Oxford Essential Dictionary of World Histories New York, United States: Berkley Publishing Group (2003) p. 458
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