"I'd have to clean you up, for that." Bruce licks a warm stripe from his jaw to his ear, sets teeth into the delicate lobe. As always finding it easy to be doing two things at once, and keeping his balance the whole time.

He doesn't clip the cuffs together. He leaves Clark's hands 'free', and then moves one of his own down to snatch the clothespin off his nipple. The shock of blood rushing back into it, the scrape of the removal, and then, suddenly, Bruce's fingers clamped over it—

That'll hurt. It comes at the same time as him shifting his hips down, rubbing them together, stroking against his cock. The other pins in Clark's thigh make gentle clackclack sounds as they brush up against each other, twisting his skin, pulling it taught and increasing the sensation of near-burning pressure.