 A number of theorists have explored the meaning and implications of prosthetic extension of the body.Elizabeth Grosz writes, "Creatures use tools, ornaments, and appliances to augment their bodily capacities.Are their bodies lacking something, which they need to replace with artificial or substitute organs?...Or conversely, should prostheses be understood, in terms of aesthetic reorganization and proliferation, as the consequence of an inventiveness that functions beyond and perhaps in defiance of pragmatic need?"