Researchers are warning that oral sex leads to a much higher risk of throat cancer, particularly in sexually promiscuous people.
People who have had more than five oral-sex partners in their lifetime are 250% more likely to have throat cancer than those who do not have oral sex, a new study suggests.
The researchers believe this is because oral sex may transmit human papillomavirus (HPV), the virus implicated in the majority of cervical cancers.
There is a vaccine, but it is not known how effective it may be in preventing orally transmitted HPV. Oral sex had previously been linked to mouth cancer.