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Yes, Dr. Vasilia. My choice in the matter -- the Earthman over you -- arises not only out of Dr. Fastolfe's instructions, but because the Earthman and I are partners in this investigation and because--" Daneel paused as though puzzled by what he was about to say, and then said it anyway, "--we are friends." Baley said, sharply, "Nevertheless bound by friendship. Do not, for your own sake, test the force of our--" Now it was he who paused and, as though to his own surprise, completed the sentence impossibly, "--love."

⁠— Asimov