the final chapter?
When you think of the friday the 13th series, you think of a hockey masked killer, stalking teenagers around a remote camp ground, and killing them as punishment for their "sins"- sex, drinking, getting high, etc. the final chapter is the best example of this. the seventh movie is also a good example, but the series had become campy by that point.
other movies in the series have little or no sex and nudity, or deviate from the basic premise of what Jason and the movies are about.