Lacrymas The logical reaction is to realize that incest and pedophilia are contrary to natural law. The family is sacred. It is a place for learning of virtue—that to which the sexual urge is subordinated: charity, honesty, and on. The same is true more broadly of the natural relation between adult and child—adults of the proper (virtuous) character should act as mentors, guides and examples for children. To bring sex into it is to pervert that natural relation and damage the development of that person’s proper and healthy character.
The emotional reaction should rightly flow from this knowledge, such that when one sees natural law violated, he is annoyed, disgusted, or furious as appropriate to the situation.