Following the box office success of Porky's (1981), parts of the film were refilmed to increase the amount of nudity and to intentionally earn an R-rating.
Actress Heather Thomas had serious reservations about filming her nude scenes for what was going to be the actress' motion picture debut. In post-production, the production used a body double without Thomas' knowledge for Thomas' topless scene at the prom, and pasted her head onto a topless body double in a photograph in the movie. These changes prompted Thomas to file a complaint with the Screen Actors Guild. This broke SAG rules as an actor or actress has right of approval over any body double that may represent them. As such, a disclaimer at the end of the film was added which read: ""A double was used for Miss Thomas in her nude scene and in the photograph."
Scott Baio and Willie Aames were both 21 during filming, while Heather Thomas was 24. Only Felice Schachter was still a high school student when the film was shot. In fact, she missed her own prom to shoot the prom sequence in the film.
Because Felice Schachter (Bernadette) was still a minor at the time of production, she wasn't allowed to be present for the filming of the scenes where people's clothes were flying off.
According to the press kit, on the first take of the sweater popping scene, Heather Thomas was pulled to the ground.