I always had a male doctor growing up and the female nurse never entered the room when the door was closed (which meant a patient was undressed). I wouldn't have liked to have had anyone (male or female) waltzing in and out of the room and I wouldn't have wanted a woman in there unless she was the doctor. If a woman did have to be there in the situation you're talking about, the boys should have had the opportunity to say they wouldn't be comfortable. Would a male doctor be able to attend a teenage girl's physical exam while she was naked? I doubt it. And I would expect that a teenage girl would feel the same way as a teenage boy about being seen up close naked by any unknown adult at that age.