The slave is really starting to glisten with sweat now, most likely because his cock and balls are being electrocuted. You knew this was coming, as typically right after breaking the male ego with humiliation the next thing to do is control him by his cock. And not just chastity mind you, but by applying pain to it with the minimum amount of effort. That is the beauty of the cock shocker which Princess Jennifer is demonstrating to Lyra and Anastasia, that with a mere press of a button a woman can instantly bring a man to his knees in pain by his cock region. Its the ultimate obedience tool.