Neurotypicals - how wierd are we?

Recently, the Small Boy has decided that he's a cat. He's been running round the house on all fours miaowing, often with a lead attached to him being pulled by a Big Sister Owner(yeah, verisimilitude fail - actually double verisimilitude fail since it's a firm rule in the house that leashes for Human Pets are never worn aorund the neck, so this is Mumma's scarf tied round his tummy).

Naturally, I am over the moon about this. Pretend Play For The Win! Also, this is treading ground that has already been well worn by the Sisters - in fact, the Taller Girl is still regularly a tiger in her tiger suit, and the Smaller Girl has been treating herself to cat facepaints as often as she can find someone to do it on her.

Still. If this weren't a thing that millions of kids do every day, something that's practically a requirement of a normal childhood, imagine how bizarre we'd find it. Pretending you're a teacher or a doctor or a daddy - fine, training for adulthood, we can see the point in that. But pretending you're a domestic animal? With a tail and whiskers and all? That's trip-to-the-psychiatrist territory.

And that's not the only bizarre thing about supposedly "normal" children. What about attachment toys - those fuzzy beloved companions of bedtime. What - you're saying your kid can't go to sleep without this particular sack of soft fluffy material in the shape of a bear/dog/sheep/cat/cow? That they talk to it as if it's real? Madness! And the universal childhood compulsion to walk on walls, when there's a perfectly good and much easier footpath just there. And invisible imaginary friends - how many kids have one of them?

Beside these peculiarities, 'strange' autistic things like hand flapping and lining up your toys seem totally normal. And just like all those behaviours have a reason, so do all the 'autistic' ones - if we can just figure out what it is.