The study found that 36 percent of the cancer patients had HPV compared to only 1 percent of the healthy control group.
Another study in The New England Journal of Medicine suggests a correlation between oral sex and throat cancer.
Oral sex, sometimes referred to as oral intercourse, is sexual activity involving the stimulation of the genitalia of a person by another person using the mouth (including the lips, tongue or teeth) or throat.
Cunnilingus is oral sex performed on a female, while fellatio is oral sex performed on a male.
Links have been reported between oral sex and oral cancer with human papillomavirus (HPV)-infected people.
While any exposure to a partner's semen appears to decrease a woman's chances for the various immunological disorders that can occur during pregnancy, immunological tolerance could be most quickly established through the oral introduction and gastrointestinal absorption of semen.
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.
Spitting and/or swallowing of the ejaculatory fluids or giving a pearl necklace may cause different sexual stimulations.
Autofellatio is a possible but rare variant; autocunnilingus may also be possible for women with extremely flexible spines.