Somebody I know has a shop that sells musical instruments.

He posted online that he had the following conversation on the phone today.

Shop owner: "Hello, this is [...] Music Store. How can I help you?"

Caller: "Hi, I am [...]. I'd like to buy my son a piano."

Shop owner: "Oh, that's great to hear. Is this his first piano?"

Short silence.

Caller: "No, this is his dad!"