I'm sure this isn't an issue unique to autistic people, but it is an issue which is very common among autistic people and likely other non-neurotypical types.
I dated an autistic person a while back who got criticized a lot (even by people who should know better, like his parents!) for "never getting excited", or people would call him a robot, etc - he did experience excitement and many other emotions in ways that were visible to me, but they were subdued compared to what most people expected.
Other autistic people (I know this from the Internet, not personally) have this issue so markedly that they cannot even facially convey pain or distress in a way that neurotypical people will recognize, which leads to issues when, for example, seeking medical help.
My own mother says I acted like a robot when I was 3, but I grew out of it.
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I dated an autistic person a while back who got criticized a lot (even by people who should know better, like his parents!) for "never getting excited", or people would call him a robot, etc - he did experience excitement and many other emotions in ways that were visible to me, but they were subdued compared to what most people expected.
Other autistic people (I know this from the Internet, not personally) have this issue so markedly that they cannot even facially convey pain or distress in a way that neurotypical people will recognize, which leads to issues when, for example, seeking medical help.
My own mother says I acted like a robot when I was 3, but I grew out of it.