Exactly how steamy is this story?
PG-13
There's lots of sex in this book. Unfortunately for the pervs in the audience, it's kind of art-house sex, in that it serves the greater themes of the story instead of fulfilling anyone's need to read the hot and steamy details. Zamyatin gets deliberately vague when describing the act, but we can still fill in the details, and the presentation of the act is pretty straightforward. In the beginning, it's a simple function, like eating or sleeping:
A Number may obtain a license to use any other Number as a sexual product. (5.4)
Even when that changes, Zamyatin looks at the act as a way of making a point about this society, rather than describing it in graphic terms. It is, in short, a very grown-up approach to the subject, while still maintaining enough discretion to skate around accusations of pornography.