Oh Those Savage Doctors

Is this one of those shirt on or shirt off moments? Doctor Deserthead seems to be only feigning interest in the paper in front him just so he can pay special attention to our friend. So what does FAA actually stand for?
Also what happened to all the other chaps who were there 2 hours ago? Did they all get to go home and sit out the rest of the war?

Again so many  questions. There are never enough answers.