People
A diplomat is a man who always remembers a woman's birthday but never remembers her age.
— Robert Frost
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The joke defines a diplomat through a useful kind of memory. He remembers a birthday as a chance to be kind, but forgets an age that might be unwelcome. Knowing what to leave unsaid becomes part of the skill of pleasing people.
Context reviewed