“Lovers never get tired of each other, because they are always talking about themselves.”
François de La Rochefoucauld book Reflections; or Sentences and Moral Maxims
Ce qui fait que les amants et les maîtresses ne s'ennuient point d'être ensemble, c'est qu'ils parlent toujours d'eux-mêmes.
Variant translation: What makes lovers and their mistresses never weary of being together is that they are always talking about themselves.
Maxim 312.
Reflections; or Sentences and Moral Maxims (1665–1678)