"What Were Once Vices Are Now Habits"
That was the title of a popular album by The Doobie Brothers back in the day. Consider that title for a moment, though.
Social mores and standards certainly do change and evolve over time. Cultures shift due to outside influences, societal standards move this way and that. So, what were these practices that were once considered "vices," but (for whatever reason) have now morphed in the face of public perception? Let's examine a few.