In highschool I worked at a pharmacy. 30-something man looks lost so I ask him if I can help him find something. He says diapers and I assume he’s a father so I stupidly say “the adult ones are right down there but you don’t need those ha ha, the baby diapers are down aisle 1”

You can guess the rest of the story…

This is why when you work in customer-facing positions in any capacity, you NEVER comment on their purchases, their choices, their business, what they are buying, if you’ve seen them before, etc. Just mouth-shut, smile and get them through.