Science of Desire
Science of Desire is a non-fiction book written by Dean Hamer and Peter Copeland in which they chronicles the scientific investigation that resulted in the the controversial conclusion that Hamer had discovered the "gay gene."
In the book, the authors point out:
- "…there is no good animal model of human heterosexuality, let alone homosexuality."
- "Pigs don't date … and horses don't get married." 
Library Journal writes:
|“||After reading books by Charles Darwin and Richard Lewontin, Hamer (a yeast geneticist at the National Cancer Institute) discovered that little is known about behavioral genetics in humans. He was intrigued enough to change his research direction. This book is a personalized account of the luck, pleasures, and pitfalls involved in scientific investigation-from the germ of an idea about genetic markers for homosexuality to results suggesting that the X-chromosome carries a marker for male homosexuality and speculation on the evolutionary and physiological mechanisms involved. Hamer's research included an intimate exploration of the development of homosexual behavior, family histories, and, finally, careful statistical and molecular analysis.||”|