Oliver arched his back, hissing a little at the sharp tug of his hair. Why was this so good? It didn't make sense at all—Sam was annoying, he was fussy, he sent detailed roommate chore meeting recap emails. But he also held on to Oliver like he was the boss of him, and yeah, something about that was really turning Oliver's crank.

He turned his face against Sam's stomach, nipping at him, just to see if he'd get a reaction. "Have you done it before?"