Shrinking Genitalia and Mass Hysteria

In his book Little Green Men, Meowing Nuns and Head-Hunting Panics: A Study of Mass Psychogenic Illness and Social Delusion, Robert E. Bartholomew writes,
“In parts of Asia, entire regions are occasionally overwhelmed by terror-stricken men who believe that their penises are shriveling up or retracting into their bodies, whereupon they will die. Those affected often place clamps or strings onto the precious organs or have family members hold the penis in relays until an appropriate treatment is obtained, often from traditional healers. … Episodes can endure for weeks or months and affect thousands. Psychiatrists are divided as to the cause of these imaginary scares. Some believe that it is a form of group psychosis triggered by stress, while others view it as a mass hysteria. … While these episodes may appear humurous to Westerners, they offer a valuable lesson because they show how vulnerable we all are to mass delusion.”

Genital Retraction Syndrome and Genital theft, is called Koro in China