Punishment plans for Pierre include clamps, plugs, paddles, turning that baguette into a petit pain for an undetermined period of time.
Stimulating him and pleasuring him with as little actual release that doesn't actually get him off or relieve any arousal.
Teasing to push him deep into horniness and give him no satisfaction.
Remote controlled devices to be activated at random occasions, not merely vibrating devices, but e-stim as well.
He will learn that we need certain things from him.