I tend to put on a fake laugh whenever I'm a bit embarrassed or nervous about something, or find the discussion a bit...awkward. I've seen this instinct occur in NTs as well as other people on the spectrum.
I do find it a bit annoying, though, when people make a laugh after everything that has been said, or everything they say, for no particular reason. It's hard to listen to people who do that a lot.
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I'm sailing across Spectrum Sea, in my little boat.
The waters of the port were choppy. After I set off, there was a long, massive storm.
Years later, however, the sea calmed. I'm still on tranquil sea, but I'll never reach the Neurotypical Beach.