Here's something curious worth noting.
Rarely, I think, is nudism or naturism mentioned in an incidental way. That is, mentioned in a context in which it, nudism, is not the topic being covered. But I remember one program during which it was.
The old TV show with Robert Stack called Unsolved Mysteries (when I used to watch TV). One episode was about a man who managed to steal some sports memorabilia from someone. I think, if I remember correctly, that he lived in a nudist club for a while, that had people living there all the time. The shows had lots of interviews with people in connection with the stories and this one included people in the nudist club. Nothing was shown and the interviewees had towels wrapped around them. About the only comment about the nudist aspect was that it was an "offbeat" lifestyle.
I don't recall another show, program or movie that presented nudism as incidental rather than central to the plot, which is usually done for the comedic or titillating effect.