Your computer doesn't care if you're smiling. Why would it? Your computer isn't a person. It's a computer! A tool. A machine. Computers are logical. They're rational. They don't get tired, or sad ...

Computers don’t know to help when you’re tired, or sad, or frustrated. They don’t steer you away from distractions. They’re oblivious to your happiness.

Computer scientists present smile database Date: July 30, 2012 ... The software takes into account whether someone is happy, sad or angry, and adjusts its estimate accordingly.

Depression Better Than Botox: Smiling Stops Sad and Depressive Thinking Believe it or not, muscles around the eyes and mouth can change how you feel.