Ley has very predictable, liberal, prevailing ideas about female sexuality (a lot I don't agree with), and I expected that. However, I found the chapters containing historical examples of perceptions and incidences of female hypersexuality in contrast with strict sexual suppression quite interesting. Plus, the history of marriage and monogamy is something that's in general quite fascinating. 

This is an ethnographic work of sorts because he interviews couples, so the theoretical elements had an added personal touch to them. No metaphysical aspects of sex are explored (expected). The tone and presentation were very positive, which made me quite sceptical also. But it's alright for what it is. It's interesting to know how some people choose to live.

Addition: Ley frames this teeming female sexuality as suppressed by society in order to prevent chaos, which I don't necessarily think is wrong. But historically, it's been the same for men, too. For most of human history, we have imposed strict sexual restrictions on both sexes, starting with the incest taboo, etc. But with men, it is to a lesser degree because men are far less likely to get raped and not likely at all to get pregnant. I don't know why so many academics get this so wrong.