😬🍴 Why does the sound of a fork scraping a plate make us feel SO uncomfortable?!   Dr Chris and Dr Xand explain what’s going on in our brains when we hear that horrible, shudder-inducing sound. 🧠🔊   Dr Chris and Dr Xand are here to explore the ins and outs of the human body! Watch brand new #OperationOuch! Halloween special on CBBC and BBC iPlayer now!