Suddenly becoming in loco parentis to a 16 year-old is a fascinating experience. Sometimes it is just like parenting 6 year-olds but it is also very enjoyably different: he dresses himself every day without help and without being asked!
Today I took B to the Weta Cave and I started telling him about Peter Jackson's early movies: Bad Taste and Braindead. Suddenly I realised that they might be R18*. I'm pretty fussy about what H & K get to watch (basically G rated DVDs and some PG rated nature/science documentaries we watch with them). But also I know that I watched R18 movies at 16-17 and thought that the restrictions were mostly pretty stupid at that point.
So what do I think is appropriate for B? After some thought I think if I'd enjoy watching a movie with him it is appropriate for him to watch because I don't like movies that are both violent and horrible, and I'd find anything too explicit embarassing. Looking at movie ratings nearly everything rated R18 falls into one of these categories so I don't think I'll be corrupting the young lad soon.
*Actually they are all R16.