Like good science fiction, the material collected in Do Androids Sleep With Electric Sheep? leaves us with more questions than we arrived with; if you can stomach the subject matter (which shouldn't really appall anyone but the most prudish and conservative, to be honest, though my perceptions may be somewhat skewed), this is prime fuel for your imaginatory engines. The focal character of James Tiptree, Jr.'s story "And I Awoke and Found Me Here on the Cold Hill's Side" suggests that, as humans, "we're built to dream outwards" [pp 239], to project our desire onto "the other", whoever or whatever it may happen to be. It's an insight that makes more sense each time you read it, and serves to underline the basic commonality between sex and science fiction, or indeed art in general -- they are both ways in which we try to subsume ourselves into (or control and dominate over) that which we are not.
Love makes us do strange things, after all.