The bathroom tiles are cold under his knees, but the warmth flooding his mouth is anything but. The dominant man's piss is salty, pungent, a primal taste that makes the kneeling man's cock twitch. He's hard, his own dick straining against his jeans, but he knows better than to touch it. This is about serving, about tasting another man's essence, about being used in the most degrading, exhilarating way.