I've just watched some episodes of Elementary (season 4) where Sherlock is dating an autistic woman (who describes herself as neuro-atypical). His character's behaviour also suggests he is on the spectrum.
It suddenly hit me how serious they both are - neither seem capable of sharing a joke ( with each other or with other friends/ colleagues) and they never laugh.
My partner and I are both "neuro-atypical" and we share a well developed sense of humour. Over the years, I have cried a lot, been worried a lot, but have laughed a lot too.
I can't think of one autistic character on TV, in movies etc that has been portrayed as having a sense of humour. Surely it's not that uncommon?