The book argues for a roughly 10%/90% nature/nurture effect in homosexuality while asserting that any genetic effect is very indirect eg: any physical characteristic making a person feel gender-atypical. The book shows that homosexual orientation is not biologically driven or fixed but that change toward heterosexuality frequently occurs naturally without any therapeutic interventions. It contains arguments not found elsewhere. Using orthodox science and summarising over 10,000 scientific publications and papers, it is nevertheless very accessible to the average  reader. See below for content.

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