3. They’re faking a smile.
A lot of us complain about wrinkles that show up way too early. But what we didn’t know is wrinkles can actually tell you if the smile is genuine or not. This is because fake smiles aren’t contagious, therefore, your eyes won’t smile along with your lips.
4. They clench their jaw.
A clenched jaw is a sign of stress. If you see them do this, it means they’re thinking about something stressful. In any case, whether they notice it or not, it happens subconsciously.