Values Dissonance is my guess. A more modern, progressive view of morality cares more about "Am I hurting people?" rather than a prescriptive set of rules and class-based behavior. Some things that were unspeakable depravity to Victorian England are considered unimportant now because they involve consenting adults who aren't hurting anyone. Some things that Victorian English considered perfectly acceptable we now consider morally depraved at best and downright evil at the worst. (Think about the class system and how foreigners and servants were regarded as sub-human...)