Darren was diagnosed with orophyrangeal cancer, a rare form of mouth cancer, at the age of only 31. But that wasn't the only shocking news that he had to deal with. Most oral cancers are caused by smoking or drinking, but Darren's was caused by the Human Papillomavirus (HPV), which is sexually transmitted. Darren had caught it through having oral sex. New research shows that there has been a dramatic... see more