97.3% still don't know why Flies rub their Hands

You've probably seen a fly rubbing its front legs together a hundred times and never once wondered why. Turns out it's not grooming for the reason most people assume — it's survival. This video breaks down what a fly's tiny hand-rubbing behavior is actually doing, why its entire body is basically covered in sensors, and why this weird little habit matters far more than it looks. #unknownfacts #insect #animals