What happens inside the human body during sexual intercourse has fascinated artists, scientists, and the public since the start of humanity. Leonardo da Vinci (1452-1519) drew the internal anatomy of a couple engaged in intercourse in "The Copulation" and suggested that connections between the penis, the distal spinal cord, and the brain existed. In the Middle Ages and the Renaissance, the act of sex was not scientifically studied. The term "sexology" was first used in Victorian times to describe the relationship between men and women.1 The idea of "sexual science" originated in Germany and Italy, and the term "sexual medicine" was not established until the 1970s. In the United States, the first physician who worked full-time in "diseases" of a sexual nature was Harry Benjamin, who studied mostly trans-sexualism. Perhaps one of the most common names associated with sexual medicine is Alfred Kinsey, who collected the sexual clinical histories of more than 18,000 patients (a story entertainingly told by T.C. Boyle in his novel The Inner Circle, Viking Adult, 2003)
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机译：自人类诞生以来，在性交过程中人体内部发生的事情吸引了艺术家，科学家和公众。莱昂纳多·达·芬奇（Leonardo da Vinci，1452-1519年）绘制了一对夫妇在《交配》中进行性交的内部解剖学，并提出阴茎，脊髓远端和大脑之间存在联系。在中世纪和文艺复兴时期，没有对性行为进行科学研究。 “性学”一词最早在维多利亚时代用于描述男女之间的关系。1“性科学”的思想起源于德国和意大利，“性医学”一词直到1970年代才被确立。在美国，第一个全职从事具有性行为的“疾病”的医生是哈里·本杰明（Harry Benjamin），他主要研究变性欲。与性医学有关的最常见的名字之一可能是阿尔弗雷德·金西（Alfred Kinsey），他收集了超过18,000名患者的性临床病史（TC。Boyle在其小说《内心圈》（The Inner Circle，Viking Adult，2003年）中讲述了这个故事
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