it's called "if someone is scared of something, someone else is aroused by it"A question occurs: chronologically, when did the Hachishaku-sama urban legend get spliced with shotacon?
Kidnapping and killing the kids, that's inherent to the myth. Now, targeting specifically the boys and having sex with them (I guess they still die?)-- I'm pretty sure that was a freak mutation.
Aka Scaroused.it's called "if someone is scared of something, someone else is aroused by it"