This chapter surveys the culture, knowledge, practice, and experience of sex in Chang’an (modern Xi’an), capital of Tang dynasty China, during the eighth and ninth centuries. It discusses courtesans and candidates, medical and religious texts, sex in literature, and ideals and practices of marriage. The era coincided with the height of the examination culture, whereby all government officials were expected to demonstrate high literacy skills and knowledge of Confucian classics. As the Tang administration increasingly relied on the civil service examinations to recruit high-ranking officials, so Chang’an became the site where examination candidates and graduates mingled with courtesans and flaunted their sensual pleasures. The changing religious landscape throughout China also reshaped how sex was understood and experienced in Chang’an in the Tang era: while Daoist sexologists continued to produce writings about the art of the bedchamber, Tantric Buddhist ideals of sexuality as a source of spiritual energy took root. Meanwhile Tang medical texts discussed sex extensively, providing a theoretical basis for treating symptoms related to intercourse and pregnancy and prescribing aphrodisiacs. The very first wave of erotica in Chinese history appeared. Aspects of Chang’an sexuality exerted a strong influence on sexuality in China for centuries to come.