My Daughter The Teenage Naturist

The title sensationalizes the topic, but the video is pretty tame.

Educating Julie (1984)

IMDB:

“A timid college student, Julie, is assigned to write a research paper on “Nudity in the 1980’s” She and her boyfriend, Steve, visit several nudist clubs in England, the south of France and in Florida to learn about why people like nudism.”