A stern femdom, her heels clicking on the polished floor, orders her sub to sit back and whip out his balls. She smirks, "You're going to smack yourself for me, aren't you?" He nods, his face flushed with humiliation. She guides him, "Harder... Harder!" His balls turn a deep shade of red, each smack echoing in the room. She leans in, her voice a sultry purr, "That's it, my pet. Show me what you can do."