Those engaging in conversation naturally relate the other speaker's statements to themselves, and insert themselves (or some degree of relation to themselves, ranging from the replier's opinions or points to actual stories about themselves) into their replies. For a successful conversation, the partners must achieve a workable balance of contributions. A successful conversation includes mutually interesting connections between the speakers or things that the speakers know.
Sometimes things are just meant to be said. Other things are not. You make up your mind where to use these volumes of quotes...