From an evolutionally perspective, oral sex serves no procreative function and there have been many theories as to what is driving this behaviour. Plastic wrap may also be used as a barrier during oral sex, but there exists no conclusive scientific research regarding how effective it may or may not be at preventing disease transmission. This is apparent in the two Latin words for the act: His sister Iris put the pieces together but, by chance, the penis was missing. Why do we do oral sex? Ancient sexy times Art depicting sexual acts has been found around the globe, left behind by countless ancient peoples and dating back thousands of years. The study concludes that people who had one to five oral sex partners in their lifetime had approximately a doubled risk of throat cancer compared with those who never engaged in this activity and those with more than five oral sex partners had a percent increased risk. Risk of STI infection, however, is generally considered significantly lower for oral sex than for vaginal or anal sex, with HIV transmission considered the lowest risk with regard to oral sex. A CDC fact sheet published in said that "some data suggest that many adolescents who engage in oral sex do not consider it to be 'sex;' therefore they may use oral sex as an option to experience sex while still, in their minds, remaining abstinent. But, it does mean sneezing in the cabbage was something of a taboo. Prevalence A report issued in September by the National Center for Health Statistics was the basis of an article in the September 26, issue of Time magazine. Other studies have argued that we instinctively use oral sex to check the health, virility and cleanliness of a partner. In the deeply patriarchal world of yesteryear, the penis reigned supreme and any challenge to that power was viewed with suspicion. The breakdown products are then absorbed as a negligible quantity of nutrients. The study found that 36 percent of the cancer patients had HPV compared to only 1 percent of the healthy control group. Author and scholar Thierry Leguay told Salon in that "the first clear real traces of fellatio are from ancient Egypt Others challenged his fears that yodelling in the valley emasculates a man, and argued rightly being a good lover means giving good head.