Freud, Sigmund. Leonardo da Vinci: A PSYCHOSEXUAL STUDY OF AN INFANTILE REMINISCENCE. New York: MOFFAT YARD & COMPANY, 1916 — 39 bet. 2012-yil 7-yanvarda qaraldi. „The situation contained in the phantasy, that a vulture opened the mouth of the child and forcefully belabored it with its tail, corresponds to the idea of fellatio, a sexual act in which the member is placed into the mouth of the woman.“
The Marriage and Family Experience: Intimate Relationship in a Changing Society. Cengage Learning, 2010 — 186 bet. ISBN 978-0-534-62425-5. 2011-yil 8-oktyabrda qaraldi. „Most people agree that we maintain virginity as long as we refrain from sexual (vaginal) intercourse. But occasionally we hear people speak of 'technical virginity' [...] Data indicate that 'a very significant proportion of teens ha[ve] had experience with oral sex, even if they haven't had sexual intercourse, and may think of themselves as virgins' [...] Other research, especially research looking into virginity loss, reports that 35% of virgins, defined as people who have never engaged in vaginal intercourse, have nonetheless engaged in one or more other forms of heterosexual sexual activity (e.g., oral sex, anal sex, or mutual masturbation).“
Joseph Gross, Michael. Like a Virgin. Here Publishing, 2003 — 44–45 bet. 0001-8996. 2011-yil 13-martda qaraldi.
