Karkat lays on his stomach on the couch, face in Dave's lap, and begins sucking the head of his hard dick. Dave wraps his fingers in Karkat's hair, tugging slightly as he sucks more of Dave's dick into his mouth. Dave lazily trails his fingers down Karkat's back, teasing them around his anus. He grabs a bottle of lube off the end table beside him and pours some onto Karkat's ass and starts slowly fingering him. Karkat lifts his ass up slightly and Dave takes the opportunity to smack and rub it, then enters a second finger into Karkat. Dave cums with a small groan into Karkat's mouth. He swallows it and rests his head on Dave's lap, enjoying his fingers working his ass.