Draco laughed, because this was not a side of Severus he got to see often, if ever. Severus was always so calculated and patient. Everything was studied, slow, and methodical.
He slid his foot over the back of Severus' leg, smirking. "Now I know why you never wanted to have sex with me before. You knew you'd get addicted." Not that he was complaining, not when their cocks were sliding so pleasantly against each other. Draco bucked his hips up, while his hands moved down Severus' spine. "Feels good."