Certain cultures have special psychological disorders. I don't know why, and worse, I don't know why I am writing about this, but, let's looks at a few of my favorites:
In Inuit culture there is something called pibloqtoq, a hysterical reaction that causes seizures and irrational behavior. According to one report, it is characterized by people tearing off their clothing and running outside. Several accounts have people tearing off their clothes and dashing naked into the nearest snowbank. Not good if that means dashing out in the midst of Alaskan winter.
In Nigeria, there is something referred to as Missing Penis Syndrome. No, I'm not making any of this up.This is an irrational fear that one's genitals have gone missing (missing as opposed to the Australian concept of going on a Walkabout). In 1997, there is a report of a lynch mob in Senegal hunting sorcerers with the power to shrink men's penises. According to a recent article in the Times of Nigeria , taxi drivers gathered to protest against a client they accused of using pigeons to steal penises (I researched this, people...look it up).
Another cultural disorder, not quite as strange as having one's penis magically taken, is Paris Syndrome. Apparently this is a condition exclusive to Japanese tourists. While in Paris they will sometimes just suffer total collapse due to culture shock. It is so bad that the Japanese embassy provides a 24 hour hotline for emergency care.
Finally there's Capgras delusion, a disorder in which you believe that someone you know has been replaced by a doppelganger, an identical looking impostor. I know. I know, it certainly would explain why the divorce rate is so high.