Try it:
You can't tickle yourself. Here's why.
Go ahead. Try. Your brain has a tiny prediction machine called the cerebellum that sees your hand coming. Because you're the one moving, the brain knows what's about to happen โ so it cancels the surprise. No surprise, no tickle. Tickling needs unpredictability. That's why other people can do it but you can't.
30 sec read
Wait, is there an exception? โ
Yes! With a robotic hand controlled by a slight delay, scientists CAN make people tickle themselves. The trick is breaking the prediction.
Talk About It Tonight
What's another time your brain might be predicting something before it happens?