How has nail polish impacted society in a positive way?

Women can enhance the look of their hands with nail polish as a fashion accessory or expression of creative fashion. It is relatively inexpensive and unlike clothing the size of the person never matters. Women see their hands all the time. Unless they look in the mirror they do not see the rest of their look. So the nail polish is something that gives a constant reminder of beauty and self care. The result to society is a happier self confident woman. In addition, if the woman goes to a nail salon for the manicure or false nails she has a place to "treat herself" and relax and results in additional benefits to the people she interacts with in her life.