In brief, raping someone who is unconscious fits neatly into the 'Power-Reassurance' category of rapist. On the other hand the guy himself appears (although we'll see as he gets older) to be more of a 'Power-Assertive' type. In either case the major factor is the perception of the victim as vulnerable, which can come in the form of "drunk and unconscious", but just as often comes in the form of, "Elderly or disabled".
Rapists tend to be highly preferential in their modus, but across typologies the victim profiles are insanely varied... except that the rapist feels they can dominate/control them.
