Severus was taken by surprise, and not exactly pleasantly so. He grunted and scratched at Sirius for exactly two heartbeats before he was utterly defeated by gentleness and, let's face it, himself. That taste was not as terrible as he first thought. In fact, it made it all the more animalistic. Severus pressed into the kiss and purred, literally purred, against Sirius's mouth.

He ought to reciprocate. Give the idiot a good wank so that he did t owe him anything. But that required no longer pressing so close or sucking on his tongue and lower lip. Two days ago and Severus was partially asexual. Now, he wanted Sirius's hands all over him without end.