To prepare himself for Breaking Dawn, Robert Pattinson, is said to have started working out and even diet in order to be prepared for his shirtless scenes. Right after the sex scene in part 1, he stopped immediately. Also, the intimate scence between Bella and Edward was so steamy that it initially caused the film to get an R rating.The scene later had to be edited in order in order for the movie to recieve a PG-13 rating.