I was my parents' first child so they were not sure what to expect. What they got was me!
If your son works like I did then, in general, he wants to behave. Sometimes he doesn't know how; sometimes he thinks it would be messed up.
My parents noticed when I was young that I wasn't making eye contact with people so they told me it was polite to look at people when I'm talking to them. So, I look at people when I'm talking to them. However, my parents never said I was supposed to look in people's eyes so I don't do that...I look at them, but not at their eyes. In general this has not caused problems.
I've posted elsewhere about my preferences then. In a few years you might want to ask your son about his preferences.
Overall, I'd encourage you to be patient with him.
Good luck to you both!
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When diagnosed I bought champagne!
I finally knew why people were strange.