The only "nudity" in this film is a plastic prosthetic penis use theatrically in films. There is actually no human nudity at all. There are several scene portraying statory rape and statuary sexual assaults. It is not about the age difference. In Norway, just like most of the EU and the US, a minor under 18 cannot consent to sex with an adult person who is their teacher, a coach, camp counselor or person with any authority over them

Full frontal male nudity, male genitalia close up and clearly visible. Only partial female nudity.