Give me some chocolate ice cream, please!

she said to the clerk.

"I'm sorry, ma'am, we're out of chocolate".

"Ok, then, give me some chocolate ice cream".

"I told you, we don't have any!"

"Well, I'll settle for chocolate ice cream".

The exasperated clerk says
"Can you spell 'straw' as in strawberry?"

"S - T - R - A - W"

"Correct! Now, can you spell 'water' as in watermelon?"

"W - A - T - E - R"

"Very good! Now can you spell 'fuck' as in 'ice cream'?"

"But there isn't any fuck in ice cream!"

"THAT'S WHAT I'VE BEEN TRYING TO TELL YOU, LADY!"