This is something of a self portrait really... Pinning on a smile.
The British are particularly good at it and I am a past master.
I don't show my true feelings easily, always making out things are fine even when they are not. I would rather hear them laugh than see them sad and I don't want to make others unhappy by unburdening myself, what use is that. How are you they ask... I'm fine. Pin on the smile.