True.
It wasn't until this forum and learning about this whole topic of "masking" that I had my "epiphany" moment.
If you are engaged in any sort of social activity or environment,...and you actually care about "fitting in",...you will be modifying your behavior. You don't have to be autistic,...nearly everyone does this.
If I am walking into a stressful situation,...myself at work,...a baby trying to die and people are doing CPR, the emotions in the room, the parents, the importance of NOT having emotions and being laser focused upon my training,...I go into my "calm, assertive" mode. Voice calm and quiet, being a leader, quietly and firmly delegating,...my job is to keep the people around me from amplifying their emotional state and focused upon their training, as well. That's a lot of masking,...and it can be quite a challenge.
But, I digress,...I think everyone in social situations are doing some level of masking in order to "be appropriate". I just think for some folks on the spectrum,...especially if they tend to not modulate their "stimming" behaviors, their physical coordination, their sensory issues, their body and verbal languages, and emotional states well, it is an added level of difficulty,...and comes off as "fake" or "bad acting".