Step 1) When a person knocks on the door, turn out light and pretend to be asleep before the door opens (there is no lock).
Step 2) Sarah walks in and asks for her iPod back.
Step 3) Within a second, two or three preps whose names are unknown (because they all look the same) appear at door and say, “Are you asleep already?” Then, “Oh, I thought you were naked in bed with each other and that’s why the lights were off.”
Step 4) Stare dumbfounded at silhouetted preps until they go next door.
Step 6) Five minutes later, there is a knock at the door. “We’re not naked,” Ruby assures the visitor, but regardless of the switched-on light, no one enters.
Please note that only steps one and two were planned.