Masks can have different meanings: beauty, happiness, a moment of fantasy, myth, decoration, creativity, celebration and culture.
In Venice, masks served an important social purpose of keeping citizens on an equal playing field. Masked, a servant could be mistaken for a nobleman - or vice versa. The mask dulls and opiates the embarrassment, it veils the shame, it disguises the redfaced cheeks, encourages one to speak and to risk.
You never know who the person is and nobody knows who they are themselves. The mask is more than a disguise, it is an incognito.