Thursday 4th October 1990   Morning coffee break  12.00 

“Have you considered a sexually transmitted disease, Desmond?”
“Dr Lewis,” my Dad looked horrified. “I am an old fashioned GP. I work in a quaint, respectable town. I know all my patients personally. I am proud to say that, since starting in the practice in 1959, I have never had to treat a single sexually transmitted disease. Occasionally, I will admit, one or two of my patients has had slightly worrying symptoms but there has always turned out to be a perfectly innocent explanation.”
“What about Mr Davis? Didn’t he have a genital wart?”
“No, I am afraid that was a rather painful diagnostic error on Dennis’ part.”

A sexually transmitted disease!