Cannibalism wasn't always negative though. In fact, it was even used as medical treatment.For example, in Germany from the 1600s to 1800s, executioners often had an abnormal side job that increased the amount of money that they owned: selling leftover body parts as medicine. As described in Kathy Stuart's Defiled Trades and Social Outcasts, human fat was sold as a remedy for broken bones, sprains, and arthritis.