The only problem with electro is the viewer must take it on faith that the electricity is actually flowing and with the amount supposedly indicated by the intensity of the subject's demonstrated suffering. I have a TENS unit, and can only turn it up to about 30% with the two pads either on my nipples or on my anus and perineum. Higher than that becomes unbearably painful. Wide open, I should think it could do extreme and serious damage - which is content for some incredible fantasies around female reaction. Back to the electro videos - one can only hope they are authentic.