Sixty-nine or 69, also known by its French name soixante-neuf (69), is a group of sex positions in which two people align themselves so that each person's mouth is near the other's genitals, simultaneously performing oral sex. The participants are thus mutually inverted like the numerals 6 and 9 in the number 69, hence the name. This position can involve any combination of genders. Although not displayed in any of the images, a 69 can also be performed with both partners on their sides, perhaps a more relaxed position.
In these positions, the partners are said to experience sexual stimulation simultaneously, but this can also distract those who try to focus solely on pleasuring themselves. The position can also be awkward for partners who are not similar in height.
"Mutual simultaneous oragenitalism is usually referred to in English under the euphemistic French numerical form, “soixante-neuf.” … The ancient Chinese Yang and Yin (male & female) symbol is identical. … The term “soixante-neuf” has not been traced any earlier than certain Whore’s Catechisms published in the 1790s in France, usually attributed to the … early leader of the French Revolution, Mlle. Théroigne de Méricourt."
"The earliest unequivocal representation of the sixty-nine appears to be that on an oil-lamp preserved in the Munich Museum (Deutsches Museum), and first reproduced in Dr. Gaston Vorberg’s … portfolio, Die Erotik der Antiken in Kleinkunst und Keramik (Munich, 1921) plate 58, showing the woman lying on top of the man. Dr. Vorberg gives this … to be of the period of the Roman Caesars … . However, another oil-lamp of the same kind, showing the sixty-nine almost identically … is more recently reproduced as a full-color plate, in Prof. Jean Marcadé’s Eros Kalos (English-language edition, Geneva : Nagel, 1965), facing page 58, in … lamps preserved in the Heracleion Museum in Greece."
"A Hindu temple-sculpture from the sacred caverns of the island of Elephanta, near Mumbai in India, showing this position with the man actually standing, and holding the woman hanging down in this from his shoulders, was … brought to England in the late eighteenth century … . … this sculptured fragment … is both discussed and illustrated in Richard Payne Knight’s A Discourse on the Worship of Priapus, privately issued for the Dilettanti Society of London in 1786 … . The illustration in question is a detail engraving given in Payne Knight’s plate XI; and the full form of this sculptured group is … given as plate XXIV."
See also 
- Rojiere, Jean (2001). The Little Book of Sex. Ulysses Press. ISBN 1-56975-305-9.
- Julie Coleman, "Love, sex, and marriage: a historical thesaurus", Rodopi, 1999, ISBN 90-420-0433-9, p.214
- Aggrawal, Anil (2009). Forensic and Medico-legal Aspects of Sexual Crimes and Unusual Sexual Practices. Boca Raton: CRC Press. p. 380. ISBN 1-4200-4308-0.
- René James Hérail, Edwin A. Lovatt, "Dictionary of Modern Colloquial French", Routledge, 1990, ISBN 0-415-05893-7, p.484
- Rathus, Spencer A.; Nevid, Jeffrey S.; Fichner-Rathus, Lois; Herold, Edward S.; McKenzie, Sue Wicks (2005). Human sexuality in a world of diversity (2nd ed.). New Jersey, USA: Pearson Education. p. 221. ISBN 0-205-46013-5
- Legman 1969, p. 289
- Legman 1969, p. 290
- Legman 1969, p. 301
- Gershon Legman (1969). Oragenitalism: Oral Techniques in Genital Excitation. New York: The Julian Press Inc.
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