Customer: Hi, I need some printer ink please. Do you carry ink for [printer model]?”

Me: “Of course. You want the color cartridge?”

Customer: “Oh, they have colors? Okay, then. I want green and pink.”

Me: “It doesn’t really work like that. The printer has one color cartridge that can do all the colors.”

Customer: “Really? How they can put that many colors in one cartridge?”

Me: “They put only blue, red and yellow, and they’re mixed to make all the colors.”

Customer: “Oh, that sounds cool. But how will the printer know which color goes where if I don’t tell it?”