Hair touching (i.e. twirling, tossing, fluffing, swinging, etc.) is a security blanket. It keeps your hands preoccupied in times of tension. Hair touching also eases stress and anxiety.
Hair touching can also be a method of flirting. Women who frequently twirl or toss their hair during a conversation with her crush are probably trying to flirt.
An alternative to hair touching is using a stress ball or fidget spinner.
Source: Refinery29; photo: Getty Images