It's a vast subject, made even more complicated by the sheer variety of views about what film actually is. Is it most like photography, or novels, or plays, or cartoons, or something else again? Let me pick out just three of the issues I touched on.
We launched our Annual Report on Thursday 11 July, as we regularly do at this time of year. The report looks back at the activities of the previous year, including key strands of work as well as individual film classification decisions at each of the BBFC classification categories.
People sometimes ask whether the BBFC try to lead public opinion, or to act as moral guardians. The Guideline Reviews provide the answers to those questions. Our aim is to keep in line with public opinion - in detail, and in a securely grounded way. Yes, we have expertise in film classification, but no, we do not set ourselves up as moral guardians.
Only two in five parents said they only buy games that have the right age rating, and half of parents said they would let their child play a game that was bought for them by a friend or relative, even if it had an unsuitable age rating. This is worrying: undoubtedly the Christmas period is prime time for pester power, and sometimes it is hard not to give in to making inappropriate purchases. It is important, though, to remember that the power is in your hands as a responsible adult to make the right choices for families and children.