From what i know, the big NO with electro play is putting electrodes at or above the heart or on the head, that's where it gets seriously dangerous (yes, that obviously includes electrified nipple clamps). People experimenting with this stuff should be mindful of where the current will be running and if there's any organs in the way that do not handle that well. I haven't really researched the topic in depth bc i really dislike the sensation of electric currents and nobody who subs for me has shown interest in this, either, so i can't comment on the safety of electric butt plugs, but at a first glance, having just one localized electrified thing in some abdominal area seems fairly low risk. I've actually seen these things and electrified dildos and penis rings very often when i happened across equipment for this kinda thing, it seems to be a very popular concept.