Bellas de noche

Bellas de noche, also known as Las ficheras, is a Mexican film directed by Miguel M. Delgado. It was filmed in 1974 and starring Sasha Montenegro and Jorge Rivero. It is regarded as the film that began the rise of Mexican sex comedies film genre as a largely mainstream genre in the Mexican Cinema for about a decade and a half; the term "fichera" coming to mean the entire genre.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.