Lunch Lady Bitch-Face

I went and got two sandwiches for my lunch today in the Spar in college. So, I go up to the counter and tell the lovely lady that I would like two white-bread sandwiches please.

"Butter?".
"No thanks - just some mayonnaise"
"So what would you like on them?"
"Well, I'll have the same on both...I.."
"Why?"
"Pardon?"
"Why do you want the same on both? You know you don't have to have the same"

Well, duh! Excuse me, bitch, what's it to you? I'll have my sandwiches whatever way I please!

What kind of question is that to ask anyone anyway?