Not The Sharpest Knife On The Cutting Board

I was working at one of those stores that literally sells everything. I was running the returns desk that night. A man came up wanting to return an item. Nothing unusual there. He wanted to return a plastic cutting board. Again, not that unusual. It was why he wanted to return it that gave me pause. He wanted to return the cutting board because it had cut marks in it after he had used it plenty.

I was caught by surprise and there was a moment where I just stared at him. He stated that the plastic should not have had cut marks after he cut and chopped things on it. I did the return.

Has anyone before this guy ever thought that a plastic cutting board wouldn’t have cut marks in it after use?