'Oral sex caused my cancer' - Michael Douglas

                                     
However, in a new interview the 68-year-old said that the particular strain he had suffered with was caused by human papilloma virus (HPV), the most common sexually transmitted disease in the U.S..Last year Cancer Research UK said that the rising rates of HPV-positive cases of oral cancer could be linked to oral sex. World Health Organisation figures have also linked HPV to more than 5 per cent of cancers worldwide.  
HPV can be passed between men and women by genital contact, most often during vaginal and anal sex. It may also be passed on during oral sex and genital-to-genital contact. HPV can be passed on between straight and same-sex partners - even when the infected person shows no symptoms.Douglas made the frank admission about how he developed the illness during an interview with The Guardian newspaper when he was asked if he had regretted smoking and drinking in the past.