On December 5, 1484, Pope Innocent VIII issued the Summis desiderantes affectibus, a papal bull in which he recognized the existence of witches and gave full papal approval for the Inquisition to proceed "correcting, imprisoning, punishing and chastising" witches "according to their deserts". In the bull, which is sometimes referred to as the "Witch-Bull of 1484", the witches were explicitly accused of having "slain infants yet in the mother's womb" (abortion) and of "hindering men from performing the sexual act and women from conceiving" (contraception).[14] Famous texts that served to guide the witch hunt and instruct magistrates on how to find and convict so-called "witches" include the Malleus Maleficarum, and Jean Bodin's De la demonomanie des sorciers.[15] The Malleus Maleficarum was written by the priest J. Sprenger (born in Rheinfelden, today Switzerland), who was appointed by Pope Innocent VIII as the General Inquisitor for Germany around 1475, and H. Institoris, who at the time was inquisitor for Tyrol, Salzburg, Bohemia and Moravia. The authors accused witches, among other things, of infanticide and having the power to steal men's penises.[16]