"I should confuse everyone and wear blue. That one really brings out my everything." Not enough to want to be sorted into Ravenclaw, but still. Sirius did know what looked good on him. He turned around and gestured to Regulus' legs, shrugging. "What? They are lovely. All shapely. Be proud of them! Wear some stockings, maybe?"

He did say it with a very serious tone, foregoing obvious mockery. Besides, it was true. He did have oddly nice legs, he had noticed that before.