Eli5. How did a red white and blue spiral pole become synonymous for barber shops?
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The most common explanation is that it symbolizes the jobs that barbers used to do besides cutting hair. Specifically dentistry and minor surgery. The white for teeth, the red for blood and the blue for has an unclear origin but may have been added in the US as a patriotic thing.
So if your barber ever nicks you, remember it’s not a bug, it’s a feature.
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