Setting the scene: I'm at Plastics for Africa and I'm buying two big buckets for Mr H to use in brewing. I have two buckets but one lid.
Cashier: You know you only have one lid.
Me: Yep, that's fine.
Cashier: But you have two buckets.
Me: I do, and it's fine.
Cashier: *counts the buckets in front of me* One. Two....but only one lid?
Me: I only want one lid.
Cashier: But you have two buckets!
Me: Is that a problem?
Cashier: I can get you another lid?