My uncle is further on a spectrum than me, and when I was young I hated when he does this. You tell the story, and there is a passing character that doesn't matter, but now he asks a lot of info about that one. Used to drive me crazy. The story is about a cute dog in a hat I saw on a train, it doesn't matter how old was the dude that walked past it and also complemented the hat. It doesn't matter where was the train going. A dog was wearing a hat, who cares how many people was also on a train.
I now understand better why he was asking the questions