Have you seen people having emotions? Any emotions?
Have you paid attention to how you respond to emotions?
Clenching teeth in frustration, clenching fists in anger, curling your toes in anxiety, making serious face during some serious talk. I’m sure you’ve seen it.
Some of those reactions are very obvious, and they are called body language. Some of them we can feel as butterflies in the stomach, or numbness in the knees, and so on.