Arabic erotic literature has a long and rich history, which goes back as far as the ninth century. Far from being the pursuit of prurient pornographers, eroticism and sexuality received considerable attention from scholars.The Sultan’s Sex Potions was written by Naṣīr al-Dīn al-Ṭūsī (1201–1274), one of the leading scientists of the age, and is part of a group of works devoted to aphrodisiacs as well as sexual practices and positions. Sober and measured in tone, the treatise was intended as a manual and guide, to be used by those afflicted with various sexual ailments, especially impotence, for self-healing, without resorting to a physician. It was composed at the request of the ruler and so its potions, electuaries, syrups and enemas enjoyed...