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Proverbial Meaning: A valet of a famous person or celebrity will not have the same high views of their boss as the general public.

Literal Origins: Because a valet (originally a personal servant) deals with all the intimate details of his or her boss's life, including their underwear, they do not hold any illusions regarding the person's real personality.

Common Usage: This proverb is rather old-fashioned and not very well-used.

See: Familiarity breeds contempt.