This isn't completely safe. In the very same way that handcuffs aren't completely safe.
More than some other types of bondage, but in similar ways to handcuffs, this can dig into sensitive parts of the wrists if the bottom struggles.
The original idea came from a hot photo that I saw on recon.
This is one of the few times that I've ever played in the living room. The living room is a more difficult room for play. Beforehand I had to get the carpet extra clean, move furniture, and move a significant chunk of chain from the playroom.
Then once the boy is in position there isn't much that can be done. Since safety didn't allow movement. But electro allows for sensation without much movement.