Astronomy wing

He knew of a secret room on the astronomy wing. He'd use it there. And since no one seemed to know of the room's existence, he'd be able to explore her body freely, take some pictures and wank to them later.

Having accessed the wing, he quickly found the spot on the bare brick wall. He tapped it with his wand twice and mumbled the incantation required to open it.

The bricks receded giving way to a room. It was empty for the exception of a mirror.