Can anyone tell me what is wrong with the follow observation (if anything)? (1) The graviton (putatively) mediates the force of gravity. The phenomenology of masses moving toward each other is due to an exchange of gravitons. Call these gravitons G1. (2) The G1 are themselves, as massless particles, subject to the gravitational force. Their paths through spacetime are bent by the presence of masses. But if the gravitational force is exerted on G1, it must be exerted via gravitons (call these gravitons G2). (3) But then the G2 are subject to gravitational effects, and G3 must be introduced. G4 for G3, G5 for G4, and so on. Thanks in advance.