(I work in a store that sells kitchen utensils. A customer has put some items on the counter, including a packaged knife. The knife is a very bright colour, and as she puts it down, her four-year-old daughter reaches out to grab it.)
Customer: “No, honey. I have to pay for it first, but you can play with it when we get home.”
Me: “Excuse me, but that’s a knife, not a toy.”
Customer: “I know it’s a knife; it’s one of those plastic ones. She can have it.”
Me: “No, it’s a real knife. It’s very sharp; it will cut her.”
Customer: “No, it’s plastic. Look at the colour.”
Me: “That’s a painted-on coating. Look right on the edge; you can see the metal edging of the blade.”
Customer: “Oh, well, what’s that for? It’s obviously plastic.” *points to a separate plastic item in the package*
Me: “That’s the scabbard, to protect and cover the blade.”
Customer: “Oh. We don’t want it, then.” *turns to daughter* “You can’t have the knife, because the mean lady said so.”