both Strap-on Sally 3: Thigh Harness Terror (1994) and Strap-on Sally 4: Double Penetration Dykes (1994) use the same opening credits roll, which includes Part 4 "introducing" the same cast members that were introduced in Part 3. However, when the crew gets listed at the start of the film(s), the same overlay is used on both films, including timing, while the underlying footage is unique to each film.