German phrase: eine Extrawurst wollen

We all know people who always ask for special treatment, right? “Eine Extrawurst (gebraten haben) wollen” conveys exactly that: to ask for one more sausage (even though everyone else just got one :flushed:).
When someone’s high maintenance and keeps asking for special treatment, I just say: “Immer eine Extrawurst!” and make this face :roll_eyes:, just as Otto right below.
But what is so special about having a second sausage? I would ask for extra dessert, if anything :slight_smile:.