Sherlock is already nude and gathering his toiletries from his locker. He'd procured a plastic basket similar to the one he'd confiscated the chemical goods for his personal items so he wouldn't have to make multiple trips. He's mostly finished with it when he hears the door open. He's smiling when he turns his head over his shoulder, but the look falls flat as soon as he notices who's standing there.

"Bill," Sherlock greets coldly, eyeing the other man up and down. "Been masturbating? John's room or yours?" He asks, turning his attention back on his own task. He keeps his attention behind him on Bill, since he's very much at a disadvantage for a fight being naked and injured.

He thinks it's obvious that he's seen John, so he doesn't answer the question directly as he starts his route toward the showers. He'd be happier if Bill just turns and walks away, and if he doesn't... well, there might be words exchanged that Bill won't be too pleased with.