Obi-Wan is aging surprisingly well (obi1) wrote in valarlogs,
It was locked. Not because he didn't trust the man on the other side, but simply because Obi-Wan had gotten into the habit of locking it with Mrs. H around. Then again, if she saw him naked, she probably would have doused his bum with talc and diapered him up.
So he didn't know Loras was there until the water was off. And it was about the same time when Obi-Wan realized he'd left his clean clothing back at the arena. Thankfully, there was a clean towel waiting for him.
"Loras? You don't happen to have any clothing that's about twice your size, do you?" He wrapped the towel around his waist.