http://www.newsweek.com/risks-oral-sex-patients-mysterious-mouth-lesions-result-frequent-fellatio-974884

A dentist in Mexico observed that one of his patients had a strange sore on the roof of his mouth. Although the patient could not explain how the sore came to form, further investigation of his personal history suggested that it was the result of performing frequent oral sex on men.

According to a BMJ Case Report published on Monday, the 47-year old patient came to his dentist for a routine oral examination. In the examination, the dentist noted the presence of an oral lesion on the his soft palate.