Exactly. The 19th century, specifically the Victorian epoch, was hardly typical for the rest of even English history, let alone the rest of Europe, and leaving aside completely the rest of the world. And it's often overlooked that Darla was much older than the rest of them, with her 400 years spanning very different eras. We often don't get the sheer bawdiness of Elizabethan drama because of the language, and probably would be shocked wandering through Restoration London...