To be fair, I wrote "new or exclusive", not "unknown to me". The "strange etiquette" you mention is exactly what I was referring to. Except that, to me, it did

To be fair, I wrote "new or exclusive", not "unknown to me". The "strange etiquette" you mention is exactly what I was referring to. Except that, to me, it did not feel like a joke, so I wanted to be sure — I am probably not enough used to some aspects of American culture.