Actually, he did know why. It was the same reason he was feeling woozy and stupid all of a sudden. He hadn’t had time yet to properly acclimate to Remus’s dazzling Remus-ness. He wasn’t expecting to be smacked with it only minutes after waking up. And now Remus was standing there all beautiful and sexy, wearing an apron and pouring him coffee, and taking care of Harry, and Sirius thought he would faint with the sheer hotness of it all.