At the risk of sounding like a rank fetishist, I have to say that Molly Young of n+1 has captured for all time a certain quality of Playboy centerfolds from the 1970s and 1980s:
Pubic hair is another delight to behold, appearing first in 1971 and thriving until 1997. Gauzy coronas of pubic hair, technicolor dreampubes of every shade. You forget how assertive a healthy growth of hair can look. It comes as a pleasant shock in the midst of a creamy-smooth expanse.
Pubic hair diminishes as the nineties draw to a close. Neat triangles turn to Band Aid-sized strips, which become little Hitler mustaches or nothing at all. The modern crotch is a bit prim, a bit less forthright. You'd think that depilation would lend a youthful look to the genitals but it has the opposite effect instead, making the girls look older and slightly jaded. (Intimate grooming signals forethought.) The youthful quality of the early centerfolds disappears.
Now that's what I call writing, and in this day and age, I thought I'd never see such prosaic thoughts on this subject again. Downright Updikean, I dare say, and on this matter, that's pretty high praise.
(Some thoughts of my own regarding the book under question.)