TIL that Vampires, in traditional folklore, suffered from arithmomania, a form of obsessive–compulsive disorder (OCD) that revolves around numbers and counting

https://en.wikipedia.org/wiki/Arithmomania
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gre5gx/til_that_vampires_in_traditional_folklore/