I'm just sitting around in class and then someone passes me a note to pass to someone else. They tell me, "It's a secret note, so DO NOT read it." That only tempts me to read it. Spoiler: And guess what is in the note? It says, "Cheezy you IDIOT! I told you NOT to read it!"
You know when in class people pass notes to each other? Well they also give those notes to other people so those people would keep passing on the note until the note finally gets to the person that the person who started it wants to. The people who start those notes even tell other people that when they're passing it, they should not read the note. But when you tell someone not to do something they're most likely going to do it.