Hair in the past was considered a personal value. Many people who were sent to battle carried the hair of their loved ones with them at all times as a symbolic representation that they are present. This shows hair within a location which generally is where your store items of value and is carried with you within your everyday life.
People who take the time to get tattoos will generally do it as a form of creative expression or a way to separate themselves from the rest of the individuals. Many of these people try to find new ways to mask themselves and make them seem unique to those around them. Hence why the word 'Unique' is written across the face to symbolize the masking of personality with creative expression.
