Neither of us have read this book, but we found this book outline passed along in an email chain a little over a year ago and found it interesting. Why Men Marry Some Women and Not Others is unique because it has statistical evidence backing up the conclusions- data was taken from 3,000 interviews of couples getting their marriage license.
The reviews on Amazon of this book were quite controversial: the conclusion that women who are overweight are much less likely to marry was certainly not well-received by women who fell into that category. Oops, the statistics have spoken! Keep hitting that gym, ladies!