Oral sex could be hazardous to your health. So say researchers who note that oral cancer stemming from the human papilloma virus is more common in the U.S. than oral cancer caused by abusing tobacco. Researchers found a 225% increase in oral cancer cases in the U.S. from 1974 to 2007, mainly among white men, said Maura Gillison, a cancer researcher at Ohio State University. The more oral-sex partners a man had, the greater his cancer risk, Gillison told a meeting of the American Association for the Advancement of Science. Tobacco use remains the leading cause of oral cancer in...