It has been 40 years since Rocky Horror hit the big screen in 1975 but the film still has a major cult following today - even for fans like myself who weren’t even born when the movie was released, let alone legally able to watch it until well over a decade since its release. Why is it such a successful movie? Maybe it’s because in the day it was seen as slightly forbidden & somewhat bizarre, and invited the audience to give themselves over to absolute pleasure.