Depressed Sexual Drive

A Doctor was telling us a story about why you should always ask about sexual history.  Apparently he, an OB/GYN, got called in to diagnose a case of supposed Pelvic Inflammatory Disease (an infection that is almost always the result of STDs) in a 55 year old woman.  He was wary about the diagnosis, so his first question to her was, "are you sexually active?"  She replied, "I haven't had sex in 20 years".  Clear cut case of depression.