Ho Yay: To a surprising degree for a novel published in 1956. Elijah and Daneel have an awfully strong degree of chemistry, especially considering that one of them is a robot. But even Elijah himself is very much conscious of it:
Daneel took Baley's hand and pressed it with firm coolness, his fingers closing to a comfortable but not painful pressure and then releasing it. Baley hoped earnestly that the creature's unreadable eyes could not penetrate Baley's mind and see that wild moment, just past and not yet entirely subsided, when all of Baley had concentrated into a feeling of an intense friendship that was almost love.