Roy walks through the door of his bedroom and freezes at the sight that greets him. He looks down at the bottle of beer he was preparing to take his first swig from, and then over at to the spectacle waiting for him. Back at the beer. Back into his room.
He contemplates going back into the kitchen for another. Or possibly to dump this one out.
He's really nor sure if he wants to be sober or not for this conversation.
Deciding that one; he wasn't likely to get drunk on a single bottle and two; he could always go get more later if he needed it, he takes a swallow to wet his inexplicably dry throat and askes;
"Robin? Why are you naked in my bedroom?"