Be polite and ask if James likes men...

Harry decides to test the Waters first so to speak. "You got a girlfriend boy?"
James peeks out from the washroom, he´s barechested. "Nah, never had one. I´ve had a few boyfriends but girls just seem so frivulous to me"

So, the boys bisexual. This is getting good. Harry decides to take the plunge soon. He goes to his bedroom and takes of his shirt, showing of his broad chest and shoulders. As James enters to check what Harrys doing her turns around and grins wryly at James. "What are you thoughts on one-nighters?"...