Two men may talk together enthusiastically ...

Two men may talk together enthusiastically  for an hour or so about shared experiences, and yet not have a true conversation. A lonely man who wants to indulge his nostalgic mood feels the need of someone with whom to share it. When he finds such a companion, he starts to pour out his monologue as though recounting a dream. And so the talk goes on between them, their monologues alternating, but after a time they suddenly become aware that they have nothing to say to each other. They are like two men standing at either side of a chasm, the bridge across which has been destroyed.

-from Yukio Mishima's Runaway Horses