Stranger in a Strange Land
"Ben, the ethics of sex is a thorny problem. Each of us is forced to grope for a solution he can live with—in the face of a preposterous unworkable and evil code of so-called 'Morals.' Most of us know the code is wrong, almost everybody breaks it. But we pay Danegeld by feeling guilty and giving lip service. Willy-nilly, the code rides us, dead and stinking, an albatross around the neck" (33.81).
"Sex should be a means of happiness. Ben, the worst thing about sex is that we use it to hurt each other. It ought never to hurt; it should bring happiness, or at least, pleasure." (33.88)
Male-femaleness is the greatest gift we have—romantic physical love may be unique to this planet. If it is, the universe is a poorer place than it could be." (36.140).