Persons At The Register May Be Younger Than They Appear

Me: “Can I see your ID, please?”

Customer: “Why? I clearly look of age.”

Me: “I’ve met twelve-year-olds with full beards and a twelve-year-old with grey hair, so I have trust issues.”

The customer laughed and handed over their ID.

I often use this line when people complain or ask why they need to show ID, and it usually makes them laugh.