Just the one slap, more a warning than anything else, and then he waits with his lips inches from Tom's skin and his hand on his ass, waiting until he feels it slip loose. Until he feels him give over.

He doesn't think he'll have any more trouble.

He's made his point. No sense in dragging it out even further. He spreads Tom's cheeks apart, leans in and gives him a long, tortuously slow lick.

He really shouldn't enjoy this as much as he does.