gravitons ?? is the inertial mass proportinal to the gravitational mass in the graviton theory of gravitation ? I ask this because I can see easily how GR imply that the two masses must be equal since spacetime curvature acts at everypoint in the body. But with gravitons I cant understand how a particle field can get to everypoint of the body with equal strength. For example electric fields and waves only affect the surface of materials the inside is almost unaffected by the electric fields acting on the bodys perimeter. How is this problem solved in string theory and other theorys that try to use particles as force carriers ?