Must-control-physicist-inside.

No, please don't. Unless you're just going to object to me using the word matter to talk about a photon. It was a joke, I don't think it requires that kind of precision. I think it loosely appropriate to refer to all anti-particles collectively as anti-matter.

That was the reason (and the fact that an antiphoton IS its own photon, and, well, complicated stuff), don't worry. ;)

Are you an actual physicist?

Yes.

Question, have you had points where something you just learned deeply and suddenly changed your understanding/intuition of reality, I only ask so as not to presume, and what were they, or the biggest one or two?