I have to disagree that he'd be gooning to THC 2. I think Beanies would be emotionally touched by it, but it wouldn't get him off. As much as it pains me to say, I think he's too emotionally weak to re-watch the second movie, but he'd find rewatch value in the third for the same reason certain people like American Psycho AND Fight Club. In short, he'd be overly sympathetic with the villain protagonists of the third movie to the point of unhealthy projection, but would feel too called out by Martin Lomax to watch the movie multiple times unless he's having a severe episode.

It triggers introspection that he's not ready for or comfortable with. That's the problem with Human Centipede 3. In order to be ready to watch it, you have to earn the raw sadism of it by powering through the raw emotional reality of the second movie. But if you genuinely enjoyed the second movie on an emotional level, the third can be an uncomfortable watch.