You should get the movie about the Kinseys life for a little insight and I really do not like the writer TC Boyle...he has a morbid imagination in my opinion... and although he has a storytellers talent (he is esy to read) I do not like all the negativity in his work... a novel is not truth so he probably merely embellished the truth of the couples very sexually open lifestyle.
http://www.imdb.com
just put in Kinsey in the search box for information.
I would venture to say that there may be better books about them but I am not sure...I just checked and you can buy the movie in amazon for 3.99 plus shipping right now...used that is, I always get great like new products used at amazon...
I have vowed to never read TC ever again, after reading Drop City and Tortilla Curtain....look for other books about the Kinseys or you might check Mr. Boyles book reviews in:
http://www.amazon.com