I just watched Last Tango In Paris. It's well known that in the middle of his career, Brando refused to memorize his lines. He once said it was because it gave him more spontaneity, like he was just thinking up the words. However, cue cards had to be placed around the set or stage hands had to feed him lines.
Do you think he really believed this or was he just yanking everybody's chain? Was he bored with acting? Did he enjoy being temperamental? He gives a lot of credit to Stella Adler for his acting training.
If anyone ever tells you that you put too much Parmesan cheese on your pasta, stop talking to them. You don't need that kind of negativity in your life.