Our happy hour fact to amaze your drinking buddies with.

Increasingly, the human papillomavirus (HPV) is resulting in oral cancer in men.

HPV, which is spread through sexual activity, has previously been linked with cervical cancer in women. Scientists now believe that the same virus also causes throat, tongue and head cancers in men -- and some researchers attribute a recent spike in these cancers to the fact that more men are engaging in oral sex (and at a younger age).

Before the '80s, HPV infection was rare in both men and woman. HPV can be prevented by a vaccine, which has long been recommended for teenage girls, and is beginning to also be suggested for teen boys.

Or, perhaps, this is a job for the much-maligned dental dam.