A conceptual evolution is traceable from early modern classifications of libido nefanda (execrable lust) to early nineteenth-century allusions to ‘perversion of the sexual instinct’, via pluralizing notions of coitus nefandus/sodomiticus in Martin Schurig’s work, and of sodomia impropria in seventeenth- through late eighteenth-century legal medicine. Johann Valentin Müller’s early breakdown of various unnatural penchants seemingly inspired similar lists in works by Johann Christoph Fahner and Johann Josef Bernt, and ultimately Heinrich Kaan. This allows an ante-dating of the ‘specification of the perverted’ (Foucault) often located in the late nineteenth century, and appreciation of pygmalionism and necrophilia as instances of ‘perverted sexual instinct’. In this light, Kaan’s early psychopathia sexualis was less innovative and more ambivalent than previously thought.

中文翻译：

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从 Libidines nefandæ 到性变态

概念演变可以追溯到早期现代对性欲的分类（可恶的欲望）到 19 世纪早期对“性本能的变态”的暗示，通过马丁·舒里格作品中性交/鸡奸的多元化概念，以及第 17 - 通过十八世纪晚期的法律医学。Johann Valentin Müller 对各种不自然倾向的早期分解似乎激发了 Johann Christoph Fahner 和 Johann Josef Bernt 以及最终 Heinrich Kaan 作品中的类似列表。这允许对通常位于 19 世纪后期的“变态的规范”（福柯）进行提前约会，并将 pygmalionism 和恋尸癖视为“变态的性本能”的实例。在这种情况下，