A guy goes into a shop and orders some Irish sausage.
Shopkeeper says: "Oh, you must be Irish."
Guy said, "Come on, man. You think because I order Irish sausage I'm Irish. What if somebody came in here and ordered French toast? Would you think he was French? What if somebody came in here and ordered a Belgian waffle? Would you consider that guy a Belgian? If a guy came in and ordered a German bratwurst, would you consider that fellow to be a German. I think it is absolutely ridiculous that just because I come in and order Irish sausage you assume that I'm Irish. Why would you do that?''
And the shopkeeper says: "Well, first of all it's a hardware store."
(adapted from an old Norm Macdonald joke - RIP Norm)