When they first met, there was nothing they couldn’t talk about and had conversations late into the night before lovemaking.
Now they can’t talk about religion because she became a believer and he was not.
And they can’t talk about politics, because he became a rigid fiscal conservative, while she was charitable and believed in government programs for the poor.
They also can’t talk about money because she, getting older, was a saver, while he, a fatalist, felt he would never live long enough to enjoy retirement.
Now all they can talk about is the cat. And then the cat died.