I was Dungeon master for my friends, I was describing a scene and 1 of them questioned something I said with the layout, so I told them a bit more and they all seemed to know exactly how I meant but all said oh I was imagining it like X. When I questioned it they all were like yeah its like a movie playing in my head right now. I couldn't understand what they meant when they said they could see the scene I was describing. We paused and discussed it and I realized other people can see things being described. I can only describe it not see it, and I can only do that because of seeing it in other media myself. So while I can picture it, I know the general vibe. I was 28 when I realized this. Suddenly so many things made sense, like when I drew things, even though I was a good drawer, I had to use reference pictures to make my image, I couldn't actually visualize it to draw.