Brain Unable To Ketchup With The Mouth

(It is a hot day. I am picking up two vanilla milkshakes and nothing else in the drive-thru. I get to the pick up window.)

Worker: *hands me the milkshakes* “Would you like ketchup with that?”

Me: *pause* “What?”

Worker: “Would you like ketchup with that?”

Me: “I don’t think that would taste very good.”

Worker: *realizing her mistake* “Oh… um….”

Me: “You automatically ask that with any order don’t you?”

Worker: “Yes…”