Oral stimulation of other parts of the body (as in kissing and licking) is usually not considered oral sex.
Oral sex may be performed as foreplay to incite sexual arousal before other sexual activities (such as vaginal or anal intercourse), Like most forms of sexual activity, oral sex can pose a risk for contracting sexually transmitted infections (STIs/STDs).
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.
There is an increased risk of STI transmission if the receiving partner has wounds on his or her genitals, or if the giving partner has wounds or open sores on or in his or her mouth, or bleeding gums.
Brushing the teeth, flossing, undergoing dental work soon before or after performing oral sex can also increase the risk of transmission, because all of these activities can cause small scratches in the lining of the mouth.
Spitting and/or swallowing of the ejaculatory fluids or giving a pearl necklace may cause different sexual stimulations.