Apparently, one of his female friends went to the doctor because she had a bad pain in her throat. The doctor came in after the examination and asked her if she had any sexual partner(s) and if she performs oral sex. She told the doctor that she has a boyfriend and does perform oral sex. The doctor then asked if he was clean of STDs, and she said, "To the best of my knowledge."
The doctor then said, "Well you have a maggot burrowed into the wall of your throat," the doctor continued, "where does your boyfriend work?"
She responded, "At a morgue."
The reality quickly dawned on both of them.