It's been my experience that NT people use verbal humor as a very social non-verbal interaction tool. By that I mean someone might use joking as a shield or wall, as a way to express mutual viewpoints for bonding and/or as a way to oppress or control others. Because humor is so incredibly context sensitive, it is one of the more misunderstood forms of communication, too. Which means NT people have also developed a whole 'nother layer of social-connection-enhancing, internal and external reactions, allowances and assumptions. Mostly for when jokes go bad - or- have some other purpose than amusement at the actual content, etc..
In other words, humor is one of those things that bonds a small group together socially &/or excludes outsiders. Currently I recognize and appreciate that I'm exceedingly lucky to work with a small IT group and all but one of us are likely or confirmed to be on the spectrum. So when we joke, the Sales and Marketing folks think we are exceedingly odd as our jokes make no social sense to them b/c ours tend to be pure content humor. And we feel a similar reaction to their jokes; often a couple of us will recognize the social purpose of one of their jokes and just roll our eyes, as that purpose is what makes the joke funny to them not the actual content. Some of their jokes aren't even objectively funny, yet they all laugh uproariously as a sign of support...I think?
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“For small creatures such as we the vastness is bearable only through love.”
―Carl Sagan