I have no diagnosis but so many traits other people think I'm autistic.
To me my life is like living in a foreign country where you don't know the language and customs.
I take things literally to the point my carer tells me something is a joke before he tells me the joke.
Using the foreign country analogy take toilets. I know how to use a public toilet, but if you are outside the UK you may have to buy toilet tissue before going into the toilet.
You may have to put money into a machine and get a pack with a toilet seat cover, paper, soap etc.
If you are in Japan you may not have paper but you do have an option for warm water to wash your bum and then dry it.
In some countries you are expected to squat.
Imagine if you are somewhere familiar like your work place and a couple of times a day you need to use the toilet, but you don't know whether it will be a squat, have paper, expect you to have brought your own paper etc.
So you don't just think, "Oh I need to pee, the toilet's there I'll be 5 mins"
You go through each scenario in your head, you watch other people to try to get an idea and you do this every time. It becomes a mental load and that can cause anxiety.
I've also heard of it being described as you being either the only person in the room who doesn't get something or you are the only person who does get it.
Does that make sense?
Sometimes things have to be explained differently eg MFL tests at school. It's not that you are expected to lie in the test but the test is of your ability in the language so even though you have one sibling, in the MFL you will get marks for saying you have an older brother and a younger sister and an aunt who lives in a different country.
It's not telling the truth but it's not telling lies either.