My sweaty nylon feet in the slaves face

OMG... I've been wearing these awesome shiny nylons for three days now. I can tell you they smell really extreme of sweat. How good that I have a slave whom I can press my stinking nylon feet full in the face. Of course I didn't expect him to be so extremely turned on by the smell of my feet. The more I put my feet in his mouth, the hornier he got. He suddenly couldn't get enough of the foot scent. It made him horny somehow. However, I forbade him to jerk off. I teased him a little and played with the fragrant nylon feet on his cock. After he was extremely horny I did it until I cum and he also what he was not allowed! Now I have to come up with a punishment for him. What do you think I should punish him with?