Schematically, sex is a completely simple thing. A male and a female meet, desire each other, charm each other, make love. This is how all bisexual beings on Earth behave - except for humans. Because we, as rational beings, make sure to achieve our simple goals by going through forty waves. And if the completion of the above-described pattern does not follow the norms of each era, of each social reality, it will be considered unnatural, strange, condemnable.

Science fiction comes as a very useful tool, in order, with a magical trick, to change the social environment, and make the unnatural normal - and the normal unnatural. With science fiction, the author can transport us to worlds that are erotic paradises (or erotic nightmares), where our secret fantasies (possibly condemnable by the present social environment) will take shape and form and find justification. [...]

(from the book's introduction)