They just need to be educated not to touch the wires. As it happens they figured it out pretty quick
Actually they could have touched the wires as long as they touched only one and nothing which was earthed, but that might be pretty complicated to learn by trial and error, especially if error often means death.
alt Hacker News
Actually they could have touched the wires as long as they touched only one and nothing which was earthed, but that might be pretty complicated to learn by trial and error, especially if error often means death.