William didn't have a ready response for that. "Right," he said awkwardly, trying with a reasonable level of success not to think about Pete sucking Gabe's dick and to keep the corresponding warmth out of his cheeks. He couldn't tell, from that comment, whether Pete was saying he had recently or not. "So, since it cropped up in students across all four Houses and a variety of years, should we assume it's environmental or airborne rather than transmitted directly from person to person?"