So what if Pierce DOESN'T like people fucking the asset before missions, since if they get too rough and tear he'll have a lower performance rate and Pierce wants him 100% functional, so he tells them no touching, no fondling, and no fucking until he's done. But a couple of young agents (maybe even Rumlow when he's still a new agent) decide to have fun while they're prepping him, because what Pierce doesn't know won't hurt him. But he finds out (he walks in or, better yet, inspects the asset for wear and sees blood and semen tracking down his thighs) and he punishes the agents by order the Winter Soldier to do to them what the agents did to him. And the Winter Soldier bends each one of them over, one by one as he fucks them raw while the others stay on their knees and watch, waiting for their turn.