Michael Douglas revealed his throat cancer was caused by oral sex. He contracted HPV.

If you recall adolescent girls up to women in their mmid 20s can take a vaccine to prevent HPV a leading cause of cervical cancer. Boys and men are not given this vaccine, but can get a the cancer too. I went through the vaccine series several years ago.

http://www.nbcnews.com/id/44734757/ns/health-mens_health/t/cancer-spike-mainly-men-tied-hpv-oral-sex/