According to Humbert Humbert (the narrator and main character in VN's novel Lolita, 1955), he is nature’s faithful hound:
I am trying to describe these things not to relive them in my present boundless misery, but to sort out the portion of hell and the portion of heaven in that strange, awful, maddening world - nymphet love. The beastly and beautiful merged at one point, and it is that borderline I would like to fix, and I feel I fail to do so utterly. Why?