Photons don't interact with each other. Photons do interact with matter.
Never fails to make me smile when you start talking as if you know what these theoretical particles are doing..what they can and can't do..talking as if you actually had some concrete evidence that they exist.
So now you deny that light exists?
Of course not..light exists as a wave, and that wave exists with properties that we as yet don't understand..photons are just a place holding story that we use till such time as we understand all the properties of the wave.
Good grief! Light has properties of both waves and particles, so obviously it is neither.
Hahahaha. SSDD thinks light is a binary choice between wave and particle, and his vote is for wave. Hahahaha.
That actually helps to clear up some of his other positions. Once he makes an either/or binary decision, he simply stops taking in new information. Fuzzy boundaries become sharp.