I have long been awe-struck by authors' claims that their books had been in the making for 5, or 10, or even 15 years. I now have a better appreciation ofthe work involved in bringing a book to press. The seeds of this project have had a long germination. The impetus for this book began more than 10 years ago when I was a graduate student in clinical psychology. Having an interest in human sexuality-and in theories on the forms of sexual attraction specifically-I was perplexed by various perspectives on this subject. Disciplines of thought that I encountered- medicine, evolutionary biology,...