The usual interpretation is the director was trying to move the plot along with things happening during the sex scenes, but the penis was so attention-grabbing that the audience missed the plot points, which made them struggle to follow the rest of the movie (be confused).
The usual interpretation is the director was trying to move the plot along with things happening during the sex scenes, but the penis was so attention-grabbing that the audience missed the plot points, which made them struggle to follow the rest of the movie (be confused).