There is an island near Italy that was the site of wars, a dumping ground for plague victims, and an insane asylum. It's considered so dangerously haunted that the Italian government does not allow public access.Picture2 Refs
The founder of Kellogg's Cereals (John Harvey Kellogg) was a doctor focusing on health and mental wellness. He began manufacturing corn cereals because he thought eating cereal for breakfast would curb people's desire to masturbate.Picture1 Ref
False teeth are often radioactive. Approximately 1 million Americans wear some form of denture; half of these dentures are made of a porcelain compound laced with minute amounts of uranium to stimulate fluorescence. Without the uranium additive, the dentures would be a dull green color when seen under artificial light.
Condoms were originally made of animal intestines or linen.More Info
In Asia before the fifteenth century, some use of glans condoms (devices covering only the head of the penis) is recorded. In China, glans condoms may have been made of oiled silk paper, or of lamb intestines. In Japan, they were made of tortoise shell or animal horn (ouch). In the 16th century, condoms were often made with linen sheaths soaked in a chemical solution and allowed to dry before use. The cloths were sized to cover the glans of the penis, and were held on with a ribbon.