They are always visible. Even when clothed. Even when denied. Even when you pretend they are irrelevant. Nipples are the first to react, the last to forget, and the most dangerously honest part of your body. You can hold back your words. You can modulate your tone. You can slow your breath. But your nipples?They betray you. Every time. And that is precisely why they must be trained.

You paused at the edge of the doorway. He didn’t see you. He had the pump gripped tightly, flushed and sweating, legs shaking just a little. His cock sat awkwardly in the cylinder, trying to rise to the pressure. The vacuum whined. He adjusted it again, frustrated. It wasn’t doing what he’d hoped. It never did. You didn’t feel pity. You felt clarity. He was trying. Trying to grow. Trying to become enough. And he didn’t know you’d already made sure he never would.