Similar to cattle, rattles tend to travel as a herd or group. Can be readily seen on the freeways of the United States blocking the fast lane or signaling 5 blocks before turning.
A theory proposed by Gamesradar.com's Rattlehead stating that the weirder the porn is, the less attractive the pornstars are.
Man 1: "Eeewww man, how come whenever I look up scat the girls are always ugly as hell?"
Man 2: "It is called "Rattles' law". Try looking upnormal stuff
guy 1: "I was about to give this homeless guy some money, but then I heard a rattlesnake and ran away."
guy 2: "You idiot, that was just a detroit rattlesnake."