Halloween

It was actually the immigrants from Ireland and Scotland that brought their Halloween traditions to the US. Trick or treat has early Christian and Medieval roots, but the tradition was perfected in the US, as an activity during the Halloween celebrations.

The orthodox community in Romania while dissing the Valentines Day, regarded Halloween as a devilish ritual. According the Romanian orthodox church you can expect the worst if you dress up like witches or monsters.

The American interpretation of celebrations like Halloween or Valentines day were later adopted all around the world.

I find Halloween to be an opportunity for adults to simply have fun, dress sexy or publicly display all sorts of fetishes.