Stretching your cock hole is important. I give this slave a thorough stretching with various sounds. I then lock his cock in a metal urethra plug. The ring around the cock head has spikes that screw in. I enjoy serving them in listening to the slave cry. I pierce his ball flesh with a few needles. From there I use small electro clamps to run electro through the needle. I further torment him with the vibrator. Sensory overload at its finest.