When Draco’s twisting and searching finger brushed against something inside of him though, it was like a light bulb going off in his head. Ah -  that was why people did this. Where Harry had been gasping and whimpering before, now he was out right moaning, his head tipped back and his hips mindless working themselves back against Draco’s hand, constantly hunting for that same rush of pleasure that had his toes curling and his back arching. He didn’t protest when Draco let his cock slip out of his mouth, but he practically whined when he stopped what he had been doing with his finger.