I invited a slave who's into my high heels and nylon. He wanted to lick them and feel them on his cock. A few light kicks and he was hard as a rock. But since he's learning from me, he also has to listen, and I told him he wasn't allowed to come this time. He wasn't allowed to cum, even though he wanted to; his cock was throbbing with lust. It was hard for him, but he did his job well.