Mr. Verres has good reason to believe that the attacks on Elliot were just a game to Voltaire. He's definitely wrong, of course, but still.
I can't remember the last time I've heard the intrustive thoughts aspect of OCD addressed in a TV show or movie. I'm actually not sure I ever have. Instead, it seems to be all about organization, germaphobia, and few select quirks that film well. I suppose the intrusive thoughts are implied by the compulsions, but those thoughts can occur without being accompanied by compulsions, and I'd like to see them get more attention.
On a lighter note, I swear I'm not trolling in panel three. Besides, it's not like they were going to get an honest answer anyway.