From Kundera’s The Unbearable Lightness of Being:
It is a completely selfless love: Tereza did not want anything of Karenin [her beloved dog]; she did not ever ask him to love her back. Nor had she ever asked herself the questions that plague human couples: Does he love me? Does he love anyone more than me? Does he love me more than I love him? Perhaps all the questions we ask of love, to measure, test, probe and save it, have the additional effect of cutting it short. Perhaps the reason we are unable to love is that we yearn to be loved, that is, we demand something (love) from our partner instead of delivering ourselves up to him demand-free and asking for nothing but his company.