Studies shows that oral sex is now the main cause of throat cancer in people under 50 years old. There has been a rise of oral cancers in the last decade mainly because of unprotected sex causing the transfer of a virus called human papilloma virus or HPV.
Before, oral cancers are diagnosed mostly to men who drink or smoke, but now it is being seen in younger men. Prof Maura Gillison of Ohio State University in Columbus said the sexually transmitted HPV was a bigger cause of some oral cancers than tobacco. Teenagers nowadays consider oral sex to be 'casual, socially acceptable, inconsequential and significantly less risk to their health than “real” sex', posing a greater risk in contracting oral cancer than smoking or alcohol.
"The American study of 300 people showed that those with more than six partners were almost nine times at greater risk of contracting the disease while those who had already experienced a previous oral HPV infection were 32 times more likely to develop cancer."
Source: www.dailymail.co.uk