Carnival is celebrated by many in consuming alcohol & food. Grotesque costumes emphasize the body in a way that “reverse” the “rules” of every day living.
Villas & estates are rented out for huge, elaborate parties & balls. If you travel to Venice at this time, you are expected to wear some sort of costume or mask. Even the police wear costumes with their uniforms.
Carnival is a costume designer’s dream.
(photos: Store window in Venice selling Carnival apparel; modern day Carnival parade of costumes)