This cite classifies the disorder Koro as a culture-bound syndrome originating from Chinese folk culture:
But this cite describes a similar disorder occurring in Ghana, implying that this delusion is not confined to a specific culture:
So does Koro require a cultural belief in penile retraction in order for it to manifest itself? If it’s a psychiatric disorder, how do “massive outbreaks” occur? If cultural beliefs are not responsible, could it happen here?
IIRC, a movie called American Tickler featured a segment about “Penis Snatchers from Outer Space”.
The “Outer Space” is the key part. Americans won’t fall for witchcraft stories, but we’re suckers for anything involving UFOs. Americans won’t believe their penises are being bewitched, but they might believe in alien cloning experiments and medical experimentation.
Well, there is a fat pad on the pubis that can sort of “envelop” the penis. Many babies are born with it and lose it as they lose their baby fat. Some don’t, and if it’s so bad the child has “buried penis” they sometimes do a fat excision so the kid has a penis you can see and enjoy.
Perhaps it’s possible that if someone gains wait in adulthood, the fat pad could increase and start “eating” the base of the penis? I dunno.