Charles hadn't been entirely sure himself; till he realized he didn't find anyone else quite as entertaining, and many far more temperamental. All this meant, of course, is a stealthy observance of Erik-- also known as him clamoring up to the back of the couch and peeking over the top of it at him for a good minute. He could be stealthy, in some instances, but he was so used to the natural weight of his powers he often didn't think about it. Ducking back down he inched around the side of the couch before drawing himself up and onto it, a low, almost nervous noise, passing his lips. He inched over a little bit at a time till he had made it as far as the center of the couch, hands folded politely against his knees, apparently trying far too hard to look innocuous and polite.