We should remember that historically it was a sign of prostitutes. Thus it depends on the girl - either to belong to this category of girls or not. Also, animals and slaves were marked in order to be counted. Thus no signs on your body means you are a person who possesses your own freedom and does not belong to anyone. Again, its up to you to decide to wich category to belong to. My choice - is to follow the American Bill of Rights: all people are born equal. No signs, no tattoes, no piercing.