You Should Smile
Ah yes. The unsolicited advice that launched a thousand eye rolls.
You should smile. You should lighten up. You should look more approachable. You should — and here's a thought — mind your business.
This collection is for the one who heard that phrase one too many times and decided to put it on a shirt. Not as a reminder. As a warning.
Wear it with the exact expression they were complaining about.