He is the patron saint of lost causes, the shepherd who wandered off to find the wolves. He is hot not because of his physique, but because of his permission. He gives us permission to be messy, to be saved by the wrong person, and to find something sacred in the profane.
Why do we find the sinner attractive?
The "sweet" modifier serves as the bridge between these two extremes. It implies a hidden tenderness—a vulnerability that is reserved only for the object of their affection. This creates a powerful "only for her/him" trope, where the character’s perceived hardness or "sinful" nature is melted away by a specific connection. For many readers and consumers of this media, the appeal lies in being the exception to the rule; they are the one person capable of seeing the "sweetness" inside a man the rest of the world views with either reverence or fear. sweet sinner father figure hot