Corpse Medicine
For hundreds of years, up until the 1890s, it was common to use the human body as an ingredient in various medicines. Which human parts were used to treat diseases? Well, pretty much all of them. For instance, the human liver was prescribed to those suffering from epilepsy. But the most common were blood, fat, bone, and flesh. During the 16th and 17th centuries, many physicians actively prescribed corpse medicine to their patients. One of the most popular remedies back in the day was made of smuggled Egyptian mummies. The mummified remains were usually powdered and used as a treatment for epilepsy, bruising, and hemorrhaging.
#18 The idea is that of sympathetic (imitative) magic : mices have good teeth, so they are good for ailing teeth... the same kind of "reasoning" is always used nowadays in... homeopathy !
#19 Some trepanated prehistoric patients have survived long enough for the bone to grow again around the opening !
#1 Maybe one was supposed to have masturbated with a handful of cornflakes. That certainly would have made it a lot less fun. (Cream on your cornflakes, anyone?)