Can someone explain the rationale behind gravitons to me? My background is computational physics, and as such i may be biased towards physics that is actually computable, such as LQG and regge calc. I have some clue what this is all about, but i have some questions: Is there any reason (beyond aestetics which i disagree with anyway) to favor a particle over a geometric explanation? Any sort of empirical matter gravitons may help explain? How is something like gravitational lensing explained in a flat spacetime with gravitons? Are there force-carrier-to-force-carrier interactions in such a model? I have a hard time imagining how youd explain bending of light with gravitons. It seems likea pressing question to me, but noone else seems to care, as far as i can tell. If your response is anything like the reasons listed on the wikipedia page on gravitons, then please try a different angle. Perhaps there is something to these arguments, but the way they are stated, they seem like garbage to me.