Why Eating with hands makes more sense?

I have always wondered, which is better?: Eating with hand or a spoon? I have always been prone to eat with spoon. However, I have come to conclusion everytime, I burn my tongue by eating extremely hot food stuff (temperature wise). Also, I believe, eating with hand puts less strain on your muscles around the mouth. My grandmother says that eating with spoon might be a reason for more wrinkles around mouth in todays people. Well sounds funny, but might be true. However if you decide to use your hands actively for eating, please make sure to cut your nails on time and also ensure your hands are clean.