"Well, er, if you must know, Ginny, er, walked in on me the other day what I was--well, never mind--the point is, she spotted me doing something and I, um, I asked her not to mention it to anybody. I must say, I did think she'd keep her word. It's nothing, really, I'd just rather--"

- Percy Weasley

Harry Potter and the Chamber of Secrets

Chapter 16: The Chamber of Secrets