I think that the question about Yoko's and John's relationships is very difficult for me, cause I haven't found the correct, well-defined answer in my thoughts. Yes, maybe I agree that she was the main reason of "crashing" The Beatles, and that she had influenced badly on John but...I think she really reflects him, his character, minds. He found himself inside this woman and she was everything for him. I can say that she was perfect, his ideal and he saw her as a mother, sister, friend, wife... Maybe she had/has something that no woman had/has in soul, in mind. I mean she was very unusual, but she was his, only his woman. I think if there were no Yoko, John wouldn't be the real John Lennon, whom we knows. right?