Other mammals have oral sex
History of oral sex
Tannahill, Reay. Sex in History. Stein and Day, NY, 1980.
Clarke, John R. Roman Sex. Harry N. Abrams, NY 2003.
Doniger, Wendy and Sudhir Kakar. Vatsyayana Kamasutra. Oxford University Press, NY, 2002.
Berkowitz, Eric. Sex and Punishment. Counterpoint Press, Berkeley, CA 2012.
Armstrong, David and Liz Metzger Armstrong. The Great American Medicine Show. Prentice Hall, NY, 1991.
Women’s insecurities about vaginal odor
Grimley, D.M. et al. “Vaginal Douches and Other Feminine Hygiene Products: Women’s Practices and Perceptions of Product Safety,” Maternal and Child Health (2006) 10:303.
Martino, J.L. and S.H. Vermund. “Vaginal Douching: Evidence for Risks or Benefits to Women’s Health,” Epidemiologic Reviews (2002) 24:109.
Stephens-Davidowitz, S. “Searching for Sex,” New York Times, Jan. 25, 2015.