Jeez Catspaw, if not seeing Cindy Williams starkers ruins your day (by the way she had breast implant surgery immediately before Laverne and Shirley) I better suggest a film made by the same people: "If you Don't Stop it You'll Go Blind!" It's a T and A satirical comedy with a lot of New York revue actors. It stars Allan Garfield who must be the only actor EVER to work constantly in straight films (you'd recognize him) and porn flicks. A sequel made about a year after was called "Can I do It Til I Need Glasses?"
I swear I'm not making this up, and I'm not a visitor to the local shady cinema. I just have a peculiar memory that stores the most unlikely information. On the other hand I can't remember what I had for lunch today!