Intense Estim on Dripping Cock Without Orgasm

I'm isolated with my slave Tortoy for several days. We're in a secluded cabin in the middle of the Black Forest. He's completely at the mercy of my sadistic whims. I tie him rock-solid to a large wooden post. He can't move at all. Now I'm going to focus on his best asset. I attach the electrodes to his cock and shock him with electricity. I use the time to thoroughly test how high I can set my shock device. The slave moans loudly from the intense pain. At the same time, however, he's visibly aroused. His throbbing cock drips with lust and twitches in time with the electrical pulses. Of course, I won't let him come. His torment has only just begun.