Wikipedia
Oral sex
Oral sex is sexual activity involving the stimulation of the genitalia by the use of the mouth, tongue, teeth or throat. Cunnilingus refers to oral sex performed on females while fellatio and irrumatio refer to oral sex performed on males. Analingus refers to oral stimulation of a persons anus. Oral stimulation of other parts of the body (as in kissing and licking) is usually not considered oral sex.
People may engage in oral sex as part of foreplay before sexual intercourse, or during or following intercourse. It may also be performed for its own sake.
Utility
Oral sex may be practiced by people of all sexual orientations. In heterosexual contexts, oral sex is used by some couples as a method of contraception and may be chosen as an alternative to sexual intercourse for this reason. Oral sexual activities are not effective methods of preventing sexually transmitted diseases (STDs), although some forms of STD are believed to be less easily spread in this way.. Accessed November 4, 2006.University Health Center, University of Georgia, . Accessed November 4, 2006
A report issued in September 2005 by the National Center for Health Statistics was the basis of an article in the September 26, 2005 issue of Time magazine. The report comes from the results of a computer-administered survey of over 12,000 Americans between the ages of 15 and 44, and states that over half the teenagers questioned have had oral sex. While some headlines have interpreted this as evidence that oral sex among teenagers is "on the rise," this was the first comprehensive study of its kind to examine the matter."lemonick">Lemonick, Michael D.,, Time, New York, September 19, 2005.
As with mutual masturbation and other forms of outercourse many people do not consider oral sex to be "sex" in the same way as penetrative intercourseJayson, Sharon,, USA Today, Washington DC, October 19, 2005. and regard it as "third base." Thus, for many people, oral sex can be seen as one w read more at » http://en.wikipedia.org/wiki/Oral+sex