I can only recall two, but I'm sure that's wrong. Strangely enough, both movies were known for their wild sex scenes. Draw whatever conclusions you like about that fact.
I remember going to see Wild Orchid with a friend after we'd both attended an afternoon wedding. We left because we were laughing and talking so loudly about said sex scenes that we were getting angry complaints from the people sitting around us.
I left Eyes Wide Shut right after the sex party scene, which I would characterize as the most boring orgy on film.
I would have walked out on this movie within a half hour at the latest if I hadn't been with three other people. And without transportation.
What movies have driven you back to the parking lot?