It's really interesting to me that the societies or cultures that weren't totally transformed by the introduction of the Abrahamic religions tend to have "weird" superstitions like this. Weird is in quotes because it is a relative term, yes?
To be honest, as disgusting as this may sound to people unfamiliar with it, it's relatively harmless on the list of weird superstitious or cultural beliefs. No person or animal is harmed by this so I can't really say much about it other than to say, it's not something I'd willingly choose to eat.