Many cultures have strong historic traditions relating to dressing up around the time of Halloween and exchanging various forms of food, but few of these traditions involve children going door-to-door asking for candy with the words: "Trick or treat!" That strange practice is believed to be American in origin, but funny enough, perhaps the people who find this the practice most baffling are the pintsized rookies being paraded around the neighborhood. While at any other time of year their parents forbid them from talking to strangers, begging for candy and roaming the streets at night, all of a sudden they change their tune and support such shenanigans on one magical evening each fall.
But here's the catch: They only receive these precious goodies by parroting out the magic words "Trick or treat." And heaven forbid the giver of candy requests a "Trick" of these poor confused newbies. But after a few years, they catch on, and trick-or-treating becomes a tradition they couldn't imagine October without.