Haha, when I was in college, I had a friend named Samantha. Her goal was to be a Dallas Cowboy's cheerleader. Very smart girl, pair for everything herself--including herself--and a great personality, as well as having the body of a porn-star.
One time she commented to me, after taking her laundry to her apartment. "I think someone is stealing my thongs". I told her "It's more likely you are dropping them, did you check?" She discarded the idea, until I saw her on the way back to her apartment stoop, quickly pick something up, and hide it. Later she admitted it was indeed what occured.