Matt squirming against Frank's hold, feeling the heat of a blush climb his chest, but every time he opens his mouth to argue Frank presses his thigh into Matt's crotch and he ends up gasping instead. And it's surprising how much it turns Matt on, because he had never thought being hurt like this would work, but feeling like a fraud and Frank forcing him to nod, agree that he's one of the good guys before he'll let Matt come..? It hurts. Leaves him clinging to Frank afterwards (and shit, he's walked away whistling with honest-to-God whipmarks on his back), while Frank settles him like a spooked horse.