Getting into James pants

Unbeknowst to James, Harry´s been checking him out on the way home. And now as James undresses and looks for the washroom to put his wet clothes, Harrys pants are getting a bit tight.
"Ehm, Harry. Where´s the washroom?"

Harry snaps back to the present, luckily James doesn´t notice. "It´s just downt the hall, second door on your left."
James heads over to the room while Harry ponders over how to go about seducing James, alternatively he could just "take" him, maybe even keep him?