I think this happens because neurotypicals doesn't like attention to details and such format of the conversation considered boring and abstruse by them. I often see this when I try to explain something more accurately.
I actually think NTs love details, but only ones about them and their own lives or those of celebrities. They're extremely happy to rattle off trivial facts about themselves, and can listen to it from a fellow NT, but only an NT. Many NTs only know how to interact with other NTs, so they cocoon themselves.
Again, this is double standards. I often feel as if no one is willing to learn anything from me, but will happily lecture me on what they know. A few months ago at school I was telling my classmates about Judy Garland, pitching her as a potential subject for our drama performance. They had no idea who she was, so I led them into the topic by telling them she played Dorothy in the Wizard of Oz. Then, as I started telling them about her life, one boy said "Oh, well, I'm just gonna think of her as Dorothy because that's all I know." mmm... or you could learn something from me and expand on what you already know. I was telling them about how she was exploited by her monster stage mum and the money-grubbing Louis B Mayer, head of MGM, and of how she eventually was killed by the deadly drug cycle she'd been put under, and got little response.
The day after they said they'd looked her up on Wikipedia and found out all of this incredible information, and all of it was what I had told them yesterday, but they were presenting to me as new. Huh, I guess they're just too proud to be educated by an aspie freak, but are happy to lecture the clueless weirdo on topics that they are familiar with.
Still, they did accept my idea to use her as the subject of the performance, so I wasn't entirely invisible to them, but still...
Oh, and one last thing. Does anyone else find that whenever they're in the middle of an in-depth explanation that requires more concentration than with listening to lunch choices, something
always happens to distract the person, and leaves you there feeling stupid and negligible. At school, someone will always be tackled, see someone else being tackled, suddenly be shown a funny photo, or receive some other stimulus that takes them ages to get over. I can never get the attention of anyone under 30 more than ten seconds before something like this happens, and I'm pushed aside.