I've bound the slave's hands and feet behind his back - to make sure he stays in position as I slap his face hard again and again. Sometimes I just slap him with a lot of power - sometimes he gets a whole bunch of slaps in a row - but I'll make sure every single one hurts him - badly! I know I'm pushing the loser's limits, but I enjoy it way too much to stop. In the end my hands really hurt - can't imagine what the slave's face feels like :-D