1615, Helkiah Crooke, Microcosmographia: A Description of the Body of Man, Book Four, Chapter One, cited in Kenneth Borris (ed.), Same-Sex Desire in the English Renaissance: A Sourcebook of Texts, 1470-1650, New York and London: Routledge, 2004, Chapter 3, p. 140, For this purpose Nature hath framed in both sexes parts and places fit for generation; beside an instinct of lust or desire, not inordinate such as by sin is superinduced in man, but natural residing in the exquisite sense of the obscene parts.
Source: wiktionary