He's president of the British Board of Film Classification (BBFC). These are the people who decide how old you have to be to watch films and videos.
But he thinks film certificates will become like bits of advice for parents, who will then have the final decision on what films you get to see.
Recently, it gave Spider-Man a 12 certificate, but some councils changed this to a PG rating for cinemas in their areas.
So the BBFC is already thinking about making the 12 certificate an "advisory" rating, which means under-13s can see a film if they have a grown-up with them.
And in the future it could be like this for all films - so you'd better start sweet-talking your parents!