Chapter 1 Same-Sex Attraction: What Needs to Be Explained?

Chapter 2 The Genetic Basis of Same-Sex Attraction

Chapter 3 Environmental Factors Predicting Same-Sex Attraction

Chapter 4 Evolutionary Theories on Same-Sex Attraction

Chapter 5 Same-Sex Attraction in Human History: Classical Greece, Imperial Rome and Christian Europe

Chapter 6 Same-Sex Attraction in Human History Part II

Chapter 7 Explaining the Patterns of Same-Sex Contact in the Historical Record

Chapter 8 The Weak Negative Selection Pressures Hypothesis

Chapter 9 The Weak Negative Selection Pressures Hypothesis: Regulation of Mating, Male-Male Competition and Social Consequences

Chapter 10 The Weak Negative Selection Pressures Hypothesis: Male-Tolerance, Forced Sex Mating Strategy and Desire to Have Children

Chapter 11 Weak Negative Selection Pressures on Same-Sex Attraction Across Time

Chapter 13 The Male Choice Hypothesis: Addressing the Criticisms

Chapter 14 Positive Selection on Male Same-Sex Attraction

Chapter 15 The Evolution of Same-Sex Attraction in Men and Women: The Weak Negative and Positive Selection Pressures Hypothesis