Sexuality in itself, in whatever form, can never be pathological, according to Morgenthaler. This has never been assumed in the case of heterosexuality. Contrary to many still prevalent theories that view homosexuality as a defect that can, for example, be corrected in the long run through genetic engineering, Morgenthaler investigates the societal and theoretical misunderstandings that have led to the pathologization of homosexuality and perversion. This volume brings together the author's most important contributions on this topic.