The old presidente or mozambique drills used to teach two to the chest and one to the head if they are still standing.
The problem with the head shot in the real world is that as stated the head is small and moving AND it isnt the best show stopper with a handgun.
The pelvic girdle shot gives you a much bigger target and its not moving around unless your opponent is a hawiian Hula girl.
I dont know why the magazine would say shoot at the genitals . damn that hurts thinking about it