The star of The Other Woman, a film about fidelity, claimed it was almost impossible for couples to stay married for life.
Cameron, 41, said: “We can have all of these girlfriends, all of these friendships. I know with my girlfriends I do totally different things with each one of them.
“I have different conversations. We like things that others don’t like.
“There are different commonalities in each one of them and when I want to do those certain things, I can go to that girlfriend and we do those things together.
“That’s perfectly fine that she doesn’t like to do the thousands of other things that I like to do.
“I’m perfectly okay with that with her.
“For some reason, we get into relationships and we expect one man to understand ‘all’ the parts of us and meet all of those needs.
“I think that’s where everything fails.”
Asked if having lots of partners was better, the single star added: “Why not? Why would that be so bad?”
In an interview promoting the new film, she also revealed she is writing another book that will follow up her women’s advice guide The Body Book.
She said: “These things evolve. You start off with one concept, do the research and the pieces fall into place.”
Some celebrity news sites even went as far as saying that Cameron Diaz is trying to convert the world to polyamory. Polyamory is a type of relationship with more than 2 partners (of any sex) but where no marriage and family commitment is usually (but not always) involved, as opposed to polygamy where marriage and family commitment is always involved.
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