Printer Problems

"I need help with my printer." An old fart lady whined like a little *****
"How can I help you, ma'am?" I answered.
"It needs ink but I don't know which one."
"did you bring the ink cartridge with you?"
"It didn't come with one."
"It didn't? That's certainly odd. So you've haven't been able to print then."
"No, I've been printing for a month without an ink cartridge."
"...Ma'am, your printer comes pre-installed with ink. You don't need to actually put a cartridge in."
"Oh, I didn't know that. I thought I was printing without ink."
printing without...Is there a severe pandemic of lobotomies in this town or something?! WTF?!