The clothing that you wear can go a long way toward determining how you are perceived in public. If you are dressed in a suit and tie, people may think that you are a professional of some sort. If you are dressed in ripped jeans or sweats, people might think that you are lazy or unmotivated.
People who like to rebel against the norms of society may decide to spike their hair, wear rings in the mouth or nose and get a tattoo that is visible to anyone who wants to look at it. In some cases, tattoos are a signal that an individual belongs to a certain group or holds a certain belief.