Sam Savage said this quote

I don't know why we stopped reading together, but gradually we were not doing it regularly, and then without realizing it was happening we were reading different books, and gradually we came not to care about the book the other one was reading, because it was not the book we were reading, and we became bored and drifted off when the other one talked about his book. What we were doing, reading different books, was furnishing different rooms, constructing separate worlds almost, in which we could sit and be ourselves again. Of course those were rooms in which we each sat alone, and we gradually spent more and more time in them and less and less in the house we lived in together.