1 2 Robert Crooks, Karla Baur (2010). Our Sexuality. Cengage Learning. tr. 241. ISBN0495812943. Truy cập ngày 12 tháng 9 năm 2013. Fellatio (fuh-LAY-shee-oh) is oral stimulation of the penis and scrotum.
1 2 3 4 See here and 47-49 for male virginity, how gay and lesbian individuals define virginity loss, and for how the majority of researchers and heterosexuals define virginity loss/"technical virginity" by whether or not a person has engaged in vaginal sex. Laura M. Carpenter (2005). Virginity lost: An Intimate Portrait of First Sexual Experiences. NYU Press. tr. 295 pages. ISBN0-8147-1652-0. Truy cập ngày 9 tháng 10 năm 2011.
1 2 Bryan Strong, Christine DeVault, Theodore F. Cohen (2010). The Marriage and Family Experience: Intimate Relationship in a Changing Society. Cengage Learning. tr. 186. ISBN0-534-62425-1. Truy cập ngày 8 tháng 10 năm 2011. 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).
↑ Marshall Cavendish Corporation (2010) [2009]. Sex and Society, Volume 1. Marshall Cavendish Corporation. tr. 61. ISBN0761479066. Truy cập ngày 29 tháng 8 năm 2013.
↑ Koelman, CA và đồng nghiệp (2000). “Correlation between oral sex and a low incidence of preeclampsia: A role for soluble HLA in seminal fluid?”. Journal of Reproductive Immunology 46 (2): 155–166. PMID10706945. doi:10.1016/S0165-0378(99)00062-5.
↑ Taylor RN (1997) "Review: Immunobiology of preeclampsia" American Journal of Reproductive Immunology Volume 37 pp. 79-86
↑ Chaouat et al., (2005) "Fourth International Workshop on Immunology of Pre-eclampsia, December 2004, Reunion, France" Journal of Reproductive Immunology Volume 67 pp. 103-111
↑ Sandra Margot; Tonianne Robino. The Pregnant Couple's Guide to Sex, Romance, and Intimacy. tr. 122–123. ISBN978-0-8065-2323-1.
↑ Ken Plummer (2002). Modern Homosexualities: Fragments of Lesbian and Gay Experiences. Routledge. tr. 187–191. ISBN1134922426. Truy cập ngày 24 tháng 8 năm 2013. The social construction of 'sex' as vaginal intercourse affects how other forms of sexual activity are evaluated as sexually satisfying or arousing; in some cases whether an activity is seen as a sexual act at all. For example, unless a woman has been penetrated by a man's penis she is still technically a virgin even if she has had lots of sexual experience.
