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Overall for adolescents, less than one-third -- 29 percent of females and 28 percent of males -- had had no sexual experience at all with the opposite sex, according to the report.
The overwhelming majority of to year-olds went on to have vaginal intercourse.
CDC: Dip in Oral Sex Among Teens, but Numbers Still High
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Description: Some studies have found that an increase in oral cancers in the United States is associated with the human papillomavirus, and researchers attribute that to the popularity of oral sex.