Irish Sausage

At a supermarket, a customer asks “In what aisle will I find Irish sausage?”
The assistant replies “In the deli department. Are you Irish?”
Clearly offended, the man replies “Yes I am, but let me ask you something, if I had asked for bratwurst would you have asked me if I was German? Or if I’d asked for tacos would you have asked if I was Mexican?”
“Probably not” says the assistant.
“So why ask me if I’m Irish?”
So the assistant says “Because we are in Dublin you thick arse!”