This page is still under construction, but I will definitely have some bits about KORO on it....
Gross Infections
Suffice it to say, all STDs belong in this category.
As do many Zoonotic1 diseases, such as rabies.
Craziness
Koro is a psychiatric illness most common in South and East Asia whose primary symptom is an overwhelming fear that the penis is being slowly sucked into the body, resulting in death.
1 A zoonotic disease is one which can be transmitted to a human through an animal or an animal product.