Notice how we're always hearing updates from the work that intelligence agencies are doing? Today the British intelligence agency decreased their terror threat warning from critical to severe. See any issues with this? Any? First off, how is severe "better" than critical? What does severe mean? That instead of security screens at the airport they'll just let anyone on the plane? And they report it with such confidence. HOW do they know to report the terror threat level? They do it like doing the weather for crying out loud, and it's almost as accurate (or inaccurate, depending on how you look at it). I mean, we didn't have a warning before Sept. 11th happened, yet it did, didn't it?
I guess with animal, instinctual drives, whether they be violence or sex, it's the same thing. It doesn't happen if you plan hard for it, it happens when you least expect it.