When I'm thinking of something that makes me happy or listening to a song I like, there's a half smile on my lips.
This is often the case on the seven minute walk from carpark to work. And the seven minute walk from work back to the carpark.
Today I saw a man standing by his car, waiting for the traffic to pass so he could open the drivers door to begin the journey home. On his face, a half smile.
He looked like a smug tosser.