I dislike turtlenecks at the best of times, as they are always unflattering to the imperfect male physique, but when worn in combination with a v-neck sweater, they say 'Grandpa' louder than any other item of clothing.
In the best stories, people are morally complex; they are flawed. We read them because the world is flawed, and we want to see it truthfully represented. And because it can be thrilling to be shocked and upset, and even to feel, for chilling moments, what it's like to be a bad person.