Why does touching an electric fan barefoot get an electric shock?

Because the electric fan leaks electricity.

Electric shock is a common name for electric injury, which usually refers to tissue damage and dysfunction caused by direct contact with power supply through air or other conductive media or high-voltage electricity of human body, and in severe cases, heartbeat and respiratory arrest occur.

Electric fan, also known as fan and electric fan, is a kind of household appliance that uses motor to drive fan blades to rotate to accelerate air circulation. Mainly used for cooling summer heat and circulating air. Widely used in homes, classrooms, offices, shops, hospitals and hotels.