Monty Python. I was thinking of drawing that one scene...

"I was going along my merry way when a pang of hunger came over me, so I infiltrated your place of business in order to purchase some cow curd for my personal consumption."
"...what?"
"I want to buy some Cheeeeese!"

I need to look up it's actual quotes, because it was funnier.

"It's not much of a cheese shop, is it?"
"What makes you say that?"
"Because it's certainly uncontaminated by cheese."

"Do you or do you not have any cheese?"
"Yes!"
"Now, I will ask you that again, and if you say no, I will shoot you through the head."
"Let me check......no."