> but for ND it's learned behaviour that costs energy and conscious effort to do. And they feel like they have to do it because society is used to people effortlessly doing it all the time, so if you don't you're considered off, or simply don't get to participate in society because you're weird/boring/scary.

And of course, every now and then you fail to do it right and people think you were acting really weird but won't explain why.