“It is a terrible error to let any natural impulse, physical or mental, stagnate. Crush it out, if you will, and be done with it; or fulfil it, and get it out of the system; but do not allow it to remain there and putrefy. The suppression of the normal sex instinct, for example, is responsible for a thousand ills. In Puritan countries one inevitably finds a morbid preoccupation with sex coupled with every form of perversion and degeneracy. ”

“I expect it will turn out that sexual intercourse is possible between Gethenian double-sexed and Hainish-norm one-sexed human beings, though such intercourse will inevitably be sterile. It remains to be proved; Estraven and I proved nothing except perhaps a rather subtler point.”

“I was starting to see that this wasn't just sex, and it wasn't something just working out of my system. Sex was just the fastest route to the deeper possession that I needed. I was falling in love with her, and falling to fast and hard to easily find any footing.”

“You see, sex for Jews is not such a terrible sin. It's just one more physical sport we're gonna stink at.”

“Love is mental illness going in and mental illness coming out. In between, you do a lot of laundry.”

“It's my experience that you first feel the impulse to write in your chest. It's like falling in love, only more so. It feels like something criminal. It feels like unspeakably wild sex. So, think: When you feel the overpowering need to go out and find some unspeakably wild sex, do you rush to tell your mom about it?”