I choose to give my smile freely and spread joy to others.

Behind a counter there are two of these and they use different muscles. One belongs to the uniform, put on at the start of a shift and genuinely tiring by hour six.

The other is the accident that happens at twenty past four when a regular says something unrepeatable about the weather. That one costs nothing, and it is the reason people keep coming back to that till.

Freely is the distinction — not more of them, but the ones that were not required. Even in a job that demands the first sort all day, the second keeps breaking through, and it is usually what a colleague means when they say they like working with you.