Knock knock.
Who's there?
Atch.
Atch who?
Sorry you are sneezing. Have you got a cold?
Knock knock.
Who's there?
Atch.
Atch who?
Sorry you are sneezing. Have you got a cold?
Alright listen up, genius. The joke is that "Atch" sounds like you're about to sneeze, see? The second person is trying to get the first person to say "Bless you!" or that they have a cold because they are sneezing, but the joke is that it is their name. You are probably the kind of person who claps when the plane lands. I'm sure your mom is proud of you.