Cindy, who is most famous as Shirley from “Laverne and Shirley,” never got naked on camera.
This Curtis Harrington film is the closest she came, which was not very close.
The real nudity in the film was provided by an actress named Susan Bernard, who was raped in a cold open, before the title and credit sequence. The director obviously didn’t believe in easing the audience into the film.

Susan Bernard was a Playboy Playmate who also appeared in Russ Meyer’s Faster Pussycat Kill Kill. Her father was famous pin-up photographer Bruno Bernard aka Bernard of Hollywood.
I’m still annoyed by this. Had such a thing for her as a kid. Took me forever to track down “The First Nudie Musical” way back when and sure enough, the whole fucking cast is naked…except her.