The Bimbo or Himbo at the race track (or OTB) for the first time who is told that if the horse they bet on shows, that means they have to flash... or streak?
National Nude Day at the racetrack. Naked trainers, jockeys, bookies, and bettors. Terrorists spray pheromones over the arena, driving horses and humans alike into frenzies of fornication -- with their own species, of course.