While tattoos have been mainstream for some time, most of the professionals I know who have one keep it in a discreet place so it can be hidden under clothes.  This Wall Street Journal article describes some reasons people may wish they had not gotten a tattoo.

Many people opt for quality waterslide tattoos that are often difficult to tell from real tattoos.  That avoids the pain and lifetime commitment of an inked tattoo.  Temporary tattoos come in hundreds of styles and sizes, so it's easy to find something you like.  They usually last about a week...depending on where they are located and how they are cared for.  Some people keep several of a favorite temporary tattoo on hand so they can wear the same one on a regular basis.