This kind of movie, literary movie, may seem a bit of drowsy in the first place. After that we kind see through the right world in front of our eyes.
It's been a tragedy of the relationship between the human, theodore, and the Operating System, Samantha. And this type of love is like the famous theory, Plato Loving Theory. people can fall in love without any body contact(that's what I see it）We may consider that would be a pure, faithful love, love without condition. But is that really we could let it happen in our real life experience. How many people can say they do not need sex, kiss,or even a little spoon.
Finally, Theodore knew that the thing between Samantha could never be a real thing. "how many men do you love simultaneously." "six hundred and forty one." being in a relationship with a computer might be insane. They are being created by human, by us. people need to go outside and meet real people, and being in a true relationship no matter how hard it would end. DO NOT LIVE IN A FANTANCY WORLD.
I love this kind of movie, it's could bring me a lot of thoughts. And I love to be thought like a real person.