This finally occurred to me the other day. NTs can just have a conversation without putting in to much effort but for us it requires concentration. Casual small talk becomes a chore so we get tired off it and try to get out of the conversation. This isn’t something NTs can understand since they don’t have to put thought into talking and acting “normal.”
The possible exception to this is when Autistic people talk about special interests. This creates dopamine in the brain so we basically become high.
“You wouldn’t know it, from some of the things I’ve said over the years, but I like people. I do. I like people, but I like them in short bursts. I don’t like people for extended periods of time. I’m ok with them for a short period of time, but once you get up past around a minute, minute and a half, I gotta get the fuck out of there. And my reason for this is one that you may share, possibly — I have a low tolerance level for stupid bullshit.”