After the fifth installment of the James Bond movie series You Only Live Twice hit the theaters, Harry Saltzman and Albert R. "Cubby" Broccoli, the producers of the lucrative franchise, had a problem. Their Bond didn't want to be Bond anymore. After spying, killing, and sexing his way through five movies, Sean Connery was ready to go.
There were several reasons for Connery's discontent. As an actor, he was worried he would spend the rest of his career being typecast in Bond-type roles. Another issue was Connery's experience in filming You Only Live Twice in Japan where the press constantly harassed the actor. Of course if you play James Bond, you're going to have to put up with a certain bit of that. But the most important issue for Connery above all was that he felt he was being exploited, and in a way he may have been.