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Never go out with wet hair
If you want to see an Italian seriously lose their cool, just go out with wet hair. In Italy, if you go out without drying your hair, you’ll risk getting a “colpo d’aria” – or, literally, a “blast of air”. This is said to cause anything from a sore neck to indigestion. In Italy, a sudden change of temperature is generally considered bad for your health, so when Italians get sick, they like to blame it on the wind.
