Over time, tattoos have served purposes as varied as camouflaging hunters, marking victory in battle, memorializing the dead, telling the wearer's life story, and symbolizing just how goddamn tough you are. For more than 5,000 years, people have been subjecting themselves to ink-stained needles in an attempt to turn their bodies into art. The 25th-anniversary edition of Taschen's 1000 Tattoos …