"Yes," he agrees, treating the subject with the same detachment he always does, even when staring at Bellatrix's wand, or his own in the mirror. "I believe the cruciatus an individual can cast, should they become able to cast one at all, is the same sort of personality factor involved in a natural inclination towards legilimency versus occlumency. The two strains feel very different afterwards, although not at the time. I should think it possible; mind is brain is nerves, after all, or at least the three are difficult to separate before death. I don't, though," he adds dryly, "propose testing the idea."
He shrugs, hunching a little at the end of it, relapsing into something closer to his posture as a student than as an adult, and his voice shades choppily Northern. "Topical potion. Developed it at school. First iteration, anyway. Good against fumes."
"I think there was a bear," he says vaguely. "The smells were inviting, but it was... loud."